QA – Placement Quizzes | LCM | Question 11

A, B and C start at the same time in the same direction to run around a circular track. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. When will they meet again at the starting point?
(A) 26 minutes 18 seconds

(B) 42 minutes 36 seconds

(C) 45 minutes

(D) 46 minutes 12 seconds

Answer: (D)

Explanation: LCM of 252, 308 and 198 = 2772. Therefore, they will meet at the starting point again after 2772 seconds = 46 minutes and 12 seconds.

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