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: 2
Find the area of the following circles, given that: ( Take π = 22/7) (a) radius = 14 mm (b) diameter = 49 m (c) radius 5 cm
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(a) Area of circle = πr²=22/7x14x14
= 22 x 2 x 14
= 616 mm²
(b) Diameter = 49 m
∴ radius = 49/2 = 24.5 m
∴ Area of circle = πr²=22/7×24.5×24.5
= 22 x 3.5 x 24.5
= 1886.5 m²
(c) Area of circle = πr²=22/7x5x5
557/7 cm²
Class 7 Maths Chapter 11 Exercise 11.3
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