P, Q and R start running around a circular field having circumference 120 metre at the same time from the same point. Speeds of P, Q and R are 4 m/minute, 8 m/minute and 10 m/minute. Find after how much time, they will meet again at the same point for the first time.

P, Q and R start running around a circular field having circumference

1.	P, Q and R start running around a circular field having circumference 120 metre at the same time from the same point. Speeds of P, Q and R are 4 m/minute, 8 m/minute and 10 m/minute. Find after how much time, they will meet again at the same point for the first time.
A.	35 minutes
B.	40 minutes
C.	45 minutes
D.	60 minutes
E.	None of these
Answer» E. None of these

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P, Q and R start running around a circular field having circumference 120 metre at the same time from the same point. Speeds of P, Q and R are 4 m/minute, 8 m/minute and 10 m/minute. Find after how much time, they will meet again at the same point for the first time.

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