An athlete completes one round of a circular track of radius 10 m in 40 sec. The distance covered by him in 2 min … (b) 140 m (c)…
Answers:
Correct Option (d) 220 m
Explanation:
No. of revolution (n) = Total time of motion/time period
= 140 sec/40 sec = 3.5 (2 πr)
= 3.5 × 2 × 22/7 × 10 = 220 m