Three friends J, K and Ljog around a circular stadium and complete one round in 12, 18 and 20 seconds respectively. In how many minutes will all the three meet again at the starting point ?->(Show Answer!)

1. Three friends J, K and Ljog around a circular stadium and complete one round in 12, 18 and 20 seconds respectively. In how many minutes will all the three meet again at the starting point

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By: anil on 05 May 2019 01.14 am

All the three friends will meet at the starting point again after X seconds, such that X is the LCM of the times taken by J, K and L to complete one round. => LCM of 12, 18 and 20 = 180 seconds = 3 minutes. Hence 3 minutes is the answer.

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