A, B, C start running at the same time and at the same point in the same direction in a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds. After what time will they meet again at the starting point?

[A]26 hours 18 seconds

[B]42 hours 36 seconds

[C]45 hours

[D]46 hours 12 seconds

**46 hours 12 seconds**

Required Time = LCM of 252, 308 and 198 seconds = 2772 seconds

= 46 minutes 12 seconds.

Hence option [D] is correct answer.