Question

A race track is in the form of a ring whose inner circumference is 352 m, and the outer circumference is 396 m. Find the width of the track

Answer 1

Radius of the inner track : 2 * 22/7 * r1 = 352 i.e. r = 56 m

Radius of the outer track : 2 * 22/7 * r2 = 396 i.e. r = 63 m

Width of track = r2 - r1 = 63 - 56 = 7 m

Area of track = area of outer circle - area of inner circle = 22/7 *r 22 - 22/7 * r12 = 22/7 ( 632 - 562) = 22/7 * 833 = 2618 m2