Question

A, B and C start at the same time in the same direction to run
around a circular stadium. A completes a round in 252 sec, B in
308 sec qand C in 198 sec, all starting at the same point. After
what time will they meet again at the starting point?​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

A completes his round in 252 secs.

B completes his round in 308 secs.

C completes his round in 198 secs.

They will again starting together

after,

LCM(252,308,198)

252=2×2×3×3×7

308=2×2×7×11

198=2×3×3×11

Required LCM = 2×2×3×3×7×11= 2772 secs

60 secs = 1 min

2772 secs = 2772/60

= 46 mins 12 secs