Question
Two friends start running on a circular track of 900
metres in opposite directions. One runs at 18 m/s and the other at 27 m/s. When will they first be together at the starting point?Solution
ATQ,
Time taken by first runner = (900 / 18) = 50 seconds
Time taken by second runner = (900 / 27) = 33.33 seconds (100/3)
LCM of (50, 100/3)
Convert both: 50 = 150/3
LCM = 300/3 = 100 seconds
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