Question

Two runners A and B start running along a circular track from the same starting point simultaneously. If A takes 15 minutes to complete one full round and B takes 20 minutes to complete 1 full round. Then find after what time they meet for the first time if they are running in the same direction.

Options
a. 75 minutes
b. 50 minutes
c. 45 minutes
d. 60 minutes

Answer 1

Explanation:

The initial difference in their completion times for a full round is 5 minutes (20 minutes - 15 minutes). Runner B gains on runner A at a rate of 6 degrees per minute. Since a full round is 360 degrees, it will take runner B 60 minutes (360 degrees / 6 degrees per minute) to close the initial gap and meet runner A on the track for the first time.