Question

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

Answer 1

Circumference of inner ring = 352m
Radius of inner ring = 2 × 22/7 × r1 = 352
= r1 = (352 × 7) / (22 × 2)
= r1 = 2646 / 44
= 56 m
Circumference of outer ring = 396m
Radius of outer circle = 2 × 22/7 ×r2 = 396
= r2 = (396 × 7) / (22 × 2)
= r2 = 2772 / 44
= 63 m
Width of track = radius of outer ring - radius of inner ring
= r2 - r1
= 63m - 56m
= 7m