A triangular park has sides 120 m, 80 m and 50 m. A gardener has to put a fence all around it and also plant grass inside. How much area does he need to plant? Find the cost of fencing it with barbed wire at the rate of Rs. 20 per metre, leaving a space of 3 m wide for a gate on one side.

Asked by Last Modified  

5 Answers

Learn Mathematics +1 Class IX-X Tuition

Follow 5
Answer

Please enter your answer

using Henon's(s-a)(s-b)(s-c)=?125×5×45×75=(25×15)?15=375?15sq.m Cost of fence without gate=(250-3)×20=247×20=RS.4940
Comments
Dislike Bookmark

Mathematics Tutor giving in depth knowledge of even simple concepts

Perimeter of the garden=120+80+50 =250m As space of 3 m wide for a gate is left on one side, so the length of wire required=(250-3)=247m. Cost of fencing=247X20=Rs 4940. semiperimeter(s)=perimeter/2 =250/2=>125m Area of triangle is given by A= sqrt(s(s-a)(s-b)(s-c))=sqrt(125x5x45x75)=(25x15sqrt(15))...
read more
Perimeter of the garden=120+80+50 =250m As space of 3 m wide for a gate is left on one side, so the length of wire required=(250-3)=247m. Cost of fencing=247X20=Rs 4940. semiperimeter(s)=perimeter/2 =250/2=>125m Area of triangle is given by A=sqrt(s(s-a)(s-b)(s-c))=sqrt(125x5x45x75)=(25x15sqrt(15)) => 375 sqrt(15) sq.m read less
Comments
Dislike Bookmark

Teacher

Perimeter = 120+80+50 = 250 m Leaving 3 m for the gate, the length to be fenced = 247 m Cost of fencing = 247 x 20 = Rs 4940 Area of the park = 1/2 x base x Altitude = 0.5 x 80 x 50 = 2000 sq m
Comments
Dislike Bookmark

B.Sc.B.Ed.

Area of a triangle =s (s-a)(s-b)(s-c); where s=(120+80+50)÷2=125 Area to plant grass= 125×5×45×75=21,09,375sq.m. Length of barbed wire=perimeter of the field-space for door =120+80+50-3=247m Cost of fencing=247×20= Rs.4940
Comments
Dislike Bookmark

Tutor

Length of garden (perimeter)=120+80+50=250 Now s=(a+b+c)/2=125 Area=?s(s-a)(s-b)(s-c)=?125×5×45×75=(25×15)?15=375?15sq.mt Cost of fence without gate=(250-3)×20=247×20=RS.4940/-
Comments
Dislike Bookmark

View 3 more Answers

Related Questions

How do we find median of given numbers ?
First we need to arrange numbers in increasing order. The value of middle term will be the MEDIAN. In case no. Of terms is odd then the middle term will be (n+1)/2, n being number of terms. But in case...
Sushil Kumar
Hi, I am Deepak, form Navy nagar, Mumbai. I want to teach math and science to class viii,viii,ix and x (english or hindi medium) both online or offline. can I get some student in Colaba?
Yes buddy definitely you will get students . For that you need to be quite patient and you need to have a look at the urban pro account frequently everyday because this is a compitative world someone else might get hired if you are not active .
Deepak
0 0
View Comments5
The exterior angles obtained on producing the base of a triangle both ways are 100° and 120°. Find all the angles.
1) Draw PQRS Square, Mark Point T on PS which is bisecting PS, Mark U on QR which is bisecting QR. 2) Join SQ where SQ intersects TU at 'O' 3) Now you can find two triangles STO, SPQ so prove both the...
Naveeen
0 0
View Comments5
ABCD is a quadrilateral in which AD = BC and ?DAB = ?CBA. Prove that ?ABD ? ?BAC.
Dear Sarath, let me correct your question, you put ? instead of ∠ So correct question should be: ABCD is a quadrilateral in which AD = BC and ∠DAB = ∠CBA. Prove that ∠ABD = ∠BAC. Solution: In ΔABD...
Sharath
0 0
View Comments7
What parents see in a good teacher,when they hire home tutor for their child's benefit?
Parents must ensure the following qualities in the home tutor for their child's benefit - 1. A verified teacher- The tutor should have a valid ID proof and address proof. It ensures safety of child. 2....
Sushma

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Multiples and Factors

Deeksha

0 0
View Comments0
Class-9-Maths L-11 Surface Area & Volume Ex 11.2 Q5

Ashish Bhatia

0 0
View Comments0
Composite Numbers
Natural numbers having more than two factors are called Composite numbers. 4, 6, 8, 9, 10, 12, 14, 15, 16, 18… are composite numbers. Number 1 is neither prime nor composite number. All even...

Arvind Kumar

0 0
View Comments0
Important Properties Every Triangle Follows

Lokesh Joshi

0 0
View Comments0
Angle ACB = 90 Degree And Angle ACD = x. Find x.
Question: Solution: Method 1 given below: Method 2 given below:

Sujoy Das

2 0
View Comments0

Recommended Articles

Science, Arts Or Commerce - Which One To Go For?

Once over with the tenth board exams, a heavy percentage of students remain confused between the three academic streams they have to choose from - science, arts or commerce. Some are confident enough to take a call on this much in advance. But there is no worry if as a student you take time to make choice between - science,...

Read full article >

5 Engaging Activities For Children To Get...

Learning for every child starts from a very young age. While the formal methods include school curriculums and private lessons, the informal methods include dancing, music, drawing, and various fun-filling activities. Playing games and practising these types of activities helps the children get out of boredom and...

Read full article >

The Trend of E-learning and it’s Benefits

E-learning is not just about delivering lessons online. It has a much broader scope that goes beyond manual paper or PowerPoint Presentations. To understand the reach of E-learning and how the whole process works in developing the Educational system, we will discuss a few points here. Let us find out how this new learning...

Read full article >

6 Healthy Habits of School Children

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

Find Class IX Tuition near you
Class IX Tuition in Delhi
Class IX Tuition in Bangalore
Class IX Tuition in Hyderabad
Class IX Tuition in Kolkata
Class IX Tuition in Mumbai
Class IX Tuition in Chennai
Class IX Tuition in Pune
Class IX Tuition in Noida
Class IX Tuition in Gurgaon
Class IX Tuition in Ghaziabad

Looking for Class 9 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you