Question

The inner circumference of a circular race track is 44 m less than the outer circumference. If the outer circumference is 396 m, then find the width of the track.

Answer 1

Formula for circumference $s= 2\pi r$

hence, $r= s/2\pi$

let,the inner and outer radius a and b respectively.

and p and q circumference of circles which is 44 m and 396 m

hence,width of the track = $b-a = \frac{396-44}{2\pi} metre = 56.0225m$