Question 57

A and B start running at the same time and from the same point around a circle. If A can complete one round in 40 seconds and B in50 seconds, how many seconds will they take to reach the starting point simultaneously?

Solution

Time taken by A to complete 1 round = 40 seconds and by B = 50 seconds

=> Time taken by them to reach the starting point simultaneously = L.C.M.(40,50)

= 200 seconds

=> Ans - (B)

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