true

Find the best tutors and institutes for Class 9 Tuition

Find Best Class 9 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Search for topics

An umbrella is made by stitching 10 triangular pieces of cloth of two different colours (see Figure), each piece measuring 20 cm, 50 cm and 50 cm. How much cloth of each
colour is required for the umbrella?

Asked by Last Modified  

CBSE/Class 9/Mathematics/Unit 5-Mensuration/Heron's formula/NCERT Solutions/Exercise 12.2

Follow 6
Answer

5 Answers

Please enter your answer

For each triangular piece, Semi-perimeter, By Heron’s formula, Area of triangle Since there are 5 triangular pieces made of two different coloured cloths, Area of each cloth required read more

For each triangular piece,

Semi-perimeter, 

By Heron’s formula,

Area of triangle

Since there are 5 triangular pieces made of two different coloured cloths,

Area of each cloth required

read less
Comments

Area of each triangular cloth = √60 ( 60 - 50 ) ( 60 - 50 ) ( 60 - 20 ) = √60 × 10 × 10 × 40 = √ 2 × 2 × 3 × 5 × 10 × 10 × 2 × 2 × 2 × 5 = 2 × 2 × 10 × 5 √3 × 2 = 200√6cm². Cloth... read more

Area of each triangular cloth

= √60 ( 60 - 50 ) ( 60 - 50 ) ( 60 - 20 )

= √60 × 10 × 10 × 40 = √ 2 × 2 × 3 × 5 × 10 × 10 × 2 × 2 × 2 × 5 = 2 × 2 × 10 × 5 √3 × 2

= 200√6cm².

Cloth required for each colour = 200√6 × 5 = 1000√6cm².

read less
Comments

Mca Certified Home/Online Tutor With 12 Years Experience.

1000
Comments

Mathematics home tutor having 6 years of teaching experience

1000√6 cm²
Comments

IITian with 20 Years of teaching exp. and IIM Calcutta MBA

1000x cloth of each colour is required for the umbrella. Use Haron's formula.
Comments

View 3 more Answers

Recommended Articles

With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...

Read full article >

When it comes deciding the right school for children, parents definitely try to be accurate. Yet the competitive academic industry offers too many options when it comes to school for children and there begins the confusion. With new schools coming up, parents get utterly confused which school will be the best for their...

Read full article >

Before sending children to school, parents hardly take the effort to well educate their children. Parents expect school to do everything and make the children become scholar. Though schools have significant roles to play in a child s life but certain developments and habits grow in a child, from parents end only. These...

Read full article >

School, college, university or an open entrance exam, certain rules stands the same for any occasion. Doing mistake in these basic rules related to exams is foolish and simply impacts the examinee s performance. To help students score good and make any exam experience a memorable one, here is a list of six tips to follow....

Read full article >

Looking for Class 9 Tuition ?

Find best Class 9 Tuition in your locality on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Class 9 Tuition Classes?

Find best tutors for Class 9 Tuition Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for Class 9 Tuition Classes?

Find best Class 9 Tuition Classes in your locality on UrbanPro

Post your learning requirement

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more