Question

Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)

Answer 1

Radius of outer circle = 19 m

Circumference = 2πr = 2 × 3.14 × 19 = 119.32 m

Radius of inner circle = 19 − 10 = 9 m

Circumference = 2πr = 2 × 3.14 × 9 = 56.52 m