Question

a racetrack is in the form of a ring whose inner circumferences is 220 m and outer circumference is 880 m. Find the width of the track.​

Answer 1

Inner Circumference, 2πr = 220

                            so, r = 35 m

Outer circumference, 2πR = 880

                           so, R = 140 m

Hence, Width of track = R - r = 140 - 35 = 105 m