Question

If the circumference of a circle is 82p , then the value of ‘r’ is

(i) 41 cm
(ii) 82 cm
(iii) 21 cm
(iv) 20 cm​

Answer 1

41cm

Explanation:

The circumference of a circle is 82π

Therefore r can be calculated as follows

2 × π × r= 82× π

2πr= 82π

r = 82π/2π

r= 41

Hence r is 41cm