Question

an athlete completes one round of a circular track of radius R in 40 seconds what will be his displacement at the end of 2 minutes 20 seconds​

Answer 1

Answer:

2 min and 20 sec = 140 sec

So 3 rounds will be fully completed but 20 seconds will be remaining after 3 rounds so By Unitary method-

1 Round ---- 40 so 0.5 Round will be completed in 20 sec so displacement is 2R

Explanation:2R

Answer 2

I hope this will help you