Question 107

Four runners started running simultaneously from a point on a circular track. They took 200 seconds, 300 seconds, 360 seconds and 450 seconds to complete the round. After how much time to they meet at the starting point for the first time?

Solution

Meeting at the first time will be L.C.M. of time taken by individuals to complete
i.e. L.C.M. of 200,300,360 and 450 will be equal to 1800 sec.

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