Circumference of a circle disc is 88 cm. Its radius is
(a) 8 cm
(b) 11 cm
(c) 14 cm
(d) 44 cm

Solution:

Given, circumference of a circle disc is 88 cm

We have to find the radius of disc

Circumference of circle = 2πr

Where, r is the radius of circle

88 = 2 × 22/7 × r

88 = 44/7 × r

r = 88(7)/44

r = 2(7)

r = 14 cm

Therefore, the radius is 14 cm

✦ Try This: Circumference of a circle disc is 44 cm. Its radius is

Given, circumference of a circle disc is 44 cm

We have to find the radius of disc

Circumference of circle = 2πr

Where, r is the radius of circle

44 = 2 × 22/7 × r

44 = 44/7 × r

r = 44(7)/44

r = 7 cm

Therefore, the radius is 7 cm

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11

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NCERT Exemplar Class 7 Maths Chapter 9 Problem 20

Circumference of a circle disc is 88 cm. Its radius is (a) 8 cm, (b) 11 cm, (c) 14 cm, (d) 44 cm

Summary:

Circumference of a circle disc is 88 cm. Its radius is 14 cm.

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