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Four runners started running simultaneously from a point on a circular track. They took 300 sec, 100 sec, 150 sec and 450 sec to complete one round. After how much time do they meet at the starting point for the first time?

Four runners started running simultaneously from a point on a circular track. They took 300 sec, 100 sec, 150 sec and 450 sec to complete one round. After how much time do they meet at the starting point for the first time? Correct Answer 900 seconds

When the four runners will meet at the starting point, they would have completed different number of rounds.

The time at which they will meet will be the LCM of the individual time taken by them

LCM of 300, 100, 150 and 450 is 900

They will meet after 900 seconds

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