Question

find the circumference of a circle whose radius is 21dm​

Answer 1

Answer:

Radius of circle (r) = 21 cm Circumference of circle

= 2πr = 2 x 22/7 x 21

= 2 x 22 x 3

= 2 x 66

= 132

Answer 2

Answer:

2πr = 2×22/7×21

= 132cm

Hope it helps:)