Question

When a marathon runner completes 3 round around a circular track he covers a distance of 66 km. Find the radius of the track

Answer 1

3.5

Explanation:

66÷3=22

thus the perimeter is 22

perimeter=2×22/7×r

22=2×22×r

7

22×7 =2r

22

7=2r

r=3.5