P, Q and R start at the same time in the same direction to run around a circular stadium. P completes a round in 126 secs, Q in 154 secs and R in 99 secs, all starting at the same point. After what time will they again at the starting point ?
23 min 6 sec
42 min 36 sec
46 min 12 sec
L.C.M. of 126 , 154 and 99 = 1386.
So, P, Q and R will again meet at the starting point in 1386 secs.
i.e., 23 min. 6 sec
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