In a circular race of 625 m, A and B start from the same point, at the same time, and speeds of 90 km/h and 72 km/h, respectively. After how much time will they meet again for the first time on the track if they are running in the same direction?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. In 125 seconds.
We know that,
Speed = Distance/Time
⇒ Running in the same direction so, relative speed = (90 - 72) = 18 km/hr
⇒ Speed in m/sec = 18 × 5/18 = 5 m/sec
⇒ Time = 625/5 = 125 sec.