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.