NCERT Solutions for Class 7 Mathematics Chapter 11
Important NCERT Questions
Class vii Math Chapter 11 Perimeter and Area Exercise 11.3
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 3
If the circumference of a circular sheet is 154 m, find its radius. Also find the area of the sheet. ( Take π = 22/7)
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Circumference of the circular sheet = 154 m
⇒ 2πr = 154 m
⇒ r = 154/2π
⇒ r = 154×7/2×22 = 24.5 m
Now Area of circular sheet = πr² = 22/7x 24.5X24.5
= 22 x 3.5 x 24.5 = 1886.5 m²
Thus, the radius and area of circular sheet are 24.5 m and 1886.5 m² respectively.
Class 7 Maths Chapter 11 Exercise 11.3
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https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-11/