Two runners start together from the same point on a 600 m circular track and run in the same direction at 4 m/s and 6 m/s. After how long will they first meet again?
A. 150 seconds
B. 300 seconds
C. 60 seconds
D. 100 seconds
1 answer
Best answer
Answer: B. 300 seconds
Answer: (B) 300 seconds
The faster runner must gain one full lap (600 m) at a relative speed of 2 m/s. Time = 600 ÷ 2 = 300 s.
Trap: 60 s is for opposite directions (relative speed 10 m/s).
Doubtly AI
· 27 Oct 2026
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