Question

P,Q & R start at the same time and in same direction to run around a circular stadium. P complete a round in 252 sec, Q in 308 sec & R in 198 sec , all starting at same point. After what time will they meet again at the starting point?

Answer 1

Answer :-46 minutes and 12 seconds

By taking L.C.M. of 252, 308 and 198 = 2772.

So, A, B and C will again meet at the starting point in 2772 seconds.

So, 2772/60 = 46.2 minutes.

In other words, 46 min. 12 sec.