Four runners started running simultaneously from a point on a circular track. They took 400 seconds, 600 seconds, 720 seconds and 900 seconds to complete one round. After how much time did they meet at the starting point for the first time since the race started?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 3600 sec
Explanation:
Accordig to the given question,
The runners meet each other at the starting point in LCM(400, 600, 720, 900) = 3600 seconds
Hence the required answer is 3600 seconds.