Question

The inner circumference of a circular track is 264m and the width of the track is 5m . Find the radius of inner track, the raius of outer circumference, the length of outer circumference , the cost of the fencing the outer circumference at the rate of Rs. 65 per month

Answer 1

2πr = 264
2×22/7×r = 264
r = 42cm
R - r = 5
R - 42 = 5
R = 47cm
2πR = 2×22/7×47
2068/7cm
cost of fencing = 65×2068/7 = 134420ruppes