Find the best tutors and institutes for Class 10 Tuition
Q17:
In a school, students thought of planting trees in and around the school to reduce air pollution. It was decided that the number of trees, that each section of each class will plant, will be the same as the class, in which they are studying, e.g., a section of Class I will plant 1 tree, a section of Class II will plant 2 trees and so on till Class XII. There are three sections of each class. How many trees will be planted by the students?
Solution :
Given:
- The number of trees planted by a section of a class is equal to the class number.
- There are 12 classes in total (Class I to Class XII).
- Each class has 3 sections.
To Find:
The total number of trees planted by all the students of all classes.
Step 1: Determining the number of trees planted by each class
Let $n$ be the class number, where $n \in \{1, 2, 3, \dots, 12\}$.
Since there are 3 sections for each class, the number of trees planted by a specific class $n$ is given by:
$T_n = 3 \times n$
Calculating the trees for each class:
- Class I: $3 \times 1 = 3$
- Class II: $3 \times 2 = 6$
- Class III: $3 \times 3 = 9$
- ...
- Class XII: $3 \times 12 = 36$
Step 2: Identifying the Arithmetic Progression (AP)
The sequence of the total trees planted by each class is: $3, 6, 9, \dots, 36$.
This sequence forms an Arithmetic Progression where:
- First term ($a$) = $3$
- Common difference ($d$) = $6 - 3 = 3$
- Number of terms ($n$) = $12$
- Last term ($l$ or $a_{12}$) = $36$
Step 3: Calculating the sum of the Arithmetic Progression
To find the total number of trees, we calculate the sum of the first $n$ terms of the AP using the formula:
$S_n = \frac{n}{2} (a + l)$
[Where $S_n$ is the sum of $n$ terms, $a$ is the first term, and $l$ is the last term.]
Substituting the known values into the formula:
$S_{12} = \frac{12}{2} (3 + 36)$
Step 4: Performing the arithmetic operations
$S_{12} = 6 \times (39)$
$S_{12} = 234$
[Calculation breakdown: $6 \times 30 = 180$ and $6 \times 9 = 54$. Adding these: $180 + 54 = 234$.]
Final Answer: The total number of trees planted by the students is 234.
More Questions from Class 10 Mathematics Arithmetic Progression EXERCISE 5.3
- Q1(i): Find the sum of the following APs: (i) 2, 7, 12, . . ., to 10 terms.
- Q1(ii): Find the sum of the following APs: (ii) –37, –33, –29, . . ., to 12 terms.
- Q1(iii): Find the sum of the following APs: (iii) 0.6, 1.7, 2.8, . . ., to 100 terms.
- Q1(iv): Find the sum of the following APs: (iv) $\frac{1}{15}, \frac{1}{12}, \frac{1}{10}$, . . ., to 11 terms.
- Q10(i): Show that $a_1, a_2, . . ., a_n, . . .$ form an AP where $a_n$ is defined as below : (i) $a_n = 3 + 4n$ Also find the sum of the first 15 terms in each case.
- Q10(ii): Show that $a_1, a_2, . . ., a_n, . . .$ form an AP where $a_n$ is defined as below : (ii) $a_n = 9 – 5n$ Also find the sum of the first 15 terms in each case.
- Q11: If the sum of the first $n$ terms of an AP is $4n – n^2$, what is the first term (that is $S_1$)? What is the sum of first two terms? What is the second term? Similarly, find the 3rd, the 10th and the $n$th terms.
- Q12: Find the sum of the first 40 positive integers divisible by 6.
- Q13: Find the sum of the first 15 multiples of 8.
- Q14: Find the sum of the odd numbers between 0 and 50.
- Q15: A contract on construction job specifies a penalty for delay of completion beyond a certain date as follows: ₹ 200 for the first day, ₹ 250 for the second day, ₹ 300 for the third day, etc., the penalty for each succeeding day being ₹ 50 more than for the preceding day. How much money the contractor has to pay as penalty, if he has delayed the work by 30 days?
- Q16: A sum of ₹ 700 is to be used to give seven cash prizes to students of a school for their overall academic performance. If each prize is ₹ 20 less than its preceding prize, find the value of each of the prizes.
- Q18: A spiral is made up of successive semicircles, with centres alternately at A and B, starting with centre at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, . . . as shown in Fig. 5.4. What is the total length of such a spiral made up of thirteen consecutive semicircles? (Take $\pi = \frac{22}{7}$) [Hint : Length of successive semicircles is $l_1, l_2, l_3, l_4, . . .$ with centres at A, B, A, B, . . ., respectively.]
- Q19: 200 logs are stacked in the following manner: 20 logs in the bottom row, 19 in the next row, 18 in the row next to it and so on (see Fig. 5.5). In how many rows are the 200 logs placed and how many logs are in the top row?
- Q2(i): Find the sums given below : (i) $7 + 10\frac{1}{2} + 14 + . . . + 84$
- Q2(ii): Find the sums given below : (ii) 34 + 32 + 30 + . . . + 10
- Q2(iii): Find the sums given below : (iii) –5 + (–8) + (–11) + . . . + (–230)
- Q20: In a potato race, a bucket is placed at the starting point, which is 5 m from the first potato, and the other potatoes are placed 3 m apart in a straight line. There are ten potatoes in the line (see Fig. 5.6). A competitor starts from the bucket, picks up the nearest potato, runs back with it, drops it in the bucket, runs back to pick up the next potato, runs to the bucket to drop it in, and she continues in the same way until all the potatoes are in the bucket. What is the total distance the competitor has to run? [Hint : To pick up the first potato and the second potato, the total distance (in metres) run by a competitor is $2 \times 5 + 2 \times (5 + 3)$]
- Q3(i): In an AP: (i) given $a = 5, d = 3, a_n = 50$, find $n$ and $S_n$.
- Q3(ii): In an AP: (ii) given $a = 7, a_{13} = 35$, find $d$ and $S_{13}$.
- Q3(iii): In an AP: (iii) given $a_{12} = 37, d = 3$, find $a$ and $S_{12}$.
- Q3(iv): In an AP: (iv) given $a_3 = 15, S_{10} = 125$, find $d$ and $a_{10}$.
- Q3(ix): In an AP: (ix) given $a = 3, n = 8, S = 192$, find $d$.
- Q3(v): In an AP: (v) given $d = 5, S_9 = 75$, find $a$ and $a_9$.
- Q3(vi): In an AP: (vi) given $a = 2, d = 8, S_n = 90$, find $n$ and $a_n$.
- Q3(vii): In an AP: (vii) given $a = 8, a_n = 62, S_n = 210$, find $n$ and $d$.
- Q3(viii): In an AP: (viii) given $a_n = 4, d = 2, S_n = –14$, find $n$ and $a$.
- Q3(x): In an AP: (x) given $l = 28, S = 144$, and there are total 9 terms. Find $a$.
- Q4: How many terms of the AP : 9, 17, 25, . . . must be taken to give a sum of 636?
- Q5: The first term of an AP is 5, the last term is 45 and the sum is 400. Find the number of terms and the common difference.
- Q6: The first and the last terms of an AP are 17 and 350 respectively. If the common difference is 9, how many terms are there and what is their sum?
- Q7: Find the sum of first 22 terms of an AP in which $d = 7$ and 22nd term is 149.
- Q8: Find the sum of first 51 terms of an AP whose second and third terms are 14 and 18 respectively.
- Q9: If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first $n$ terms.
CBSE Solutions for Class 10 Mathematics Arithmetic Progression
Chapters in CBSE - Class 10 Mathematics
Top Tutors who teach Arithmetic Progression
Top Tutor
Godrej Garden City, Ahmedabad
6 yrs of
Exp
20 students
1554 hrs of classes completed
500
per hour
Online Classes
I’m a Teacher having 5years experience and offering Home/Online tution of Mathematics & Science for CBSE/ GSEB Students of class 8 to 12. I’m Bachelor of Engineer. My teaching / coaching / mentoring style is such that the students can start and accelerate from whatever their current level. I am sure with my right efforts an average students also will be transformed into best performer.
Top Tutor
J.P.Nagar VI Phase, Bangalore
12 yrs of
Exp
5 students
1797 hrs of classes completed
1000
per hour
Online Classes
Tutor's home
I'm delighted to introduce myself as an experienced educator with a strong passion for teaching Mathematics and Science to students from 6th to 10th grade in both CBSE and ICSE boards. Educational Background: I hold a degree in BSc Physics, followed by an MSc and a B.Ed. My academic journey has equipped me with a deep understanding of the subjects and effective teaching methodologies. Passion for Teaching: Teaching is not just a profession for me; it's a lifelong passion that ignited during my younger days. The desire to contribute to society through education has been a driving force throughout my career. Teaching Experience: My journey in education began during my BSc days when I started tutoring younger students. Over the years, I've refined my teaching skills, working as a home tutor and gaining valuable experience in schools catering to both ICSE and CBSE curricula. Online Teaching Approach: In this digital age, I understand the importance of adapting to modern teaching methods. My online sessions are designed to be interactive, engaging, and conducive to effective learning. Each session lasts for an hour, during which I ensure a comprehensive coverage of the material, coupled with interactive discussions and lesson plans. Commitment to Excellence: My commitment is not just to impart knowledge but to foster a love for learning. I strive to create an environment where students not only understand the subjects but also develop critical thinking skills. If you're seeking a dedicated and passionate educator for your child's academic journey, I'm here to help. Let's embark on this learning adventure together!
Top Tutor
Nehru Nagar, Belgaum
2 yrs of
Exp
9 students
266 hrs of classes completed
260
per hour
Online Classes
I teach Mathematics to students from Class 7 to Class 10, with 3 years of teaching experience. My focus is on helping students build strong conceptual understanding and develop effective problem-solving skills to excel academically. I have completed my 2nd PUC (Pre-University Course), a Bachelor of Engineering (B.E.) from Visveswaraya Technological University in 2020, and a Bachelor of Education (B.Ed.) from Indira Gandhi National Open University in 2022. I have also completed a program with Cambridge Learning Resources, which has enhanced my teaching techniques and ability to engage students effectively. Over the years, I have guided students to improve their Mathematics understanding and performance, helping them gain confidence in handling both basic and complex problems. My teaching approach emphasizes clarity, practice, and logical reasoning to ensure steady improvement. I have also earned an RPA (Robotic Process Automation) certification in robotics, which reflects my technical skills and commitment to continuous learning. I often incorporate logical thinking and problem-solving strategies inspired by this training into my lessons. I prefer to conduct online classes, offering flexibility in timing and easy access for students. I teach both individual and small group sessions, allowing personalized attention and interactive learning experiences for every student. My classes are interactive, using motivational videos, personal digital pads, and other digital tools to make learning engaging and effective. These resources help students visualize concepts better and retain knowledge more efficiently. I provide custom-prepared notes to support student learning and revision. My ultimate goal is to make Mathematics understandable, enjoyable, and confidence-building, enabling every student to perform at their best and develop a strong foundation for future studies.
This guy is too good at his teaching. He explains the concepts very clear, gets to know about the students, gives his own ideas, own methods, and also gives good advices. He is excellent to consider. I just like him!, he is a great tutor and price is reasonably good.
Super Tutor
Nerul Sector 20, Thane
10 yrs of
Exp
62 students
2969 hrs of classes completed
1200
per hour
Online Classes
I have done b.Tech in electrical engineering from IIT KANPUR. I taught one year in akash institute patna, 2 years in fiitjee patna. Currently I am teaching in unacademy. I have taught more than 6000 jee and neet aspirants. In which more than 500 students are selected in iitand aiims. If some one is interested to improve their physics upto jee advanced level take help with me .And see the magic. I can help students in their all type of assignment from any institute like allen, fiitjee, narayna, akash, resonance. I can help students to solve both volume of h.C verma within two month if some one is intrested in solving I.E.Irodov join me and see the next level of physics. My way of teaching is so easy and so advanced that student will realyy enjoy it. Don't waste your time in making decision just join and experience my level
He is a very dedicated teacher with excellent knowledge on topic. He knows Subject very well and teach accordingly to kids.
Top Tutor
Mathura Road, Delhi
20 yrs of
Exp
14 students
1590 hrs of classes completed
1000
per hour
Online Classes
Tutor's home
For me, teaching is part of learning. As I am teaching I am also learning from my learners as they are diverse. Each learner in the classroom brings his or her unique background and ability. These are the elements that I invest in my teaching. Moreover, I allow learners to be themselves. This is a way of creating a conducive environment for learning.
Its been a really nice teaching experience with Mr.Amit so far. He is very knowledgeable and a patient teacher. He always clarifies the concepts clearly and ensures good understanding.
Find more Tutor for Arithmetic Progression in your City
- Bangalore Mathematics Tutors
- Delhi Mathematics Tutors
- Chennai Mathematics Tutors
- Gurgaon Mathematics Tutors
- Noida Mathematics Tutors
- Hyderabad Mathematics Tutors
- Mumbai Mathematics Tutors
- Ghaziabad Mathematics Tutors
- Chandigarh Mathematics Tutors
- Pune Mathematics Tutors
- Jaipur Mathematics Tutors
- Surat Mathematics Tutors
Download free CBSE - Class 10 Mathematics Arithmetic Progression EXERCISE 5.3 worksheets
Download Now
