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Maths Puzzle
Three friends A, B and C run around a circular track of length 120 metres at speeds of 5 m/s, 7 m/sec and 15 m/sec, starting simultaneously from the same point and in the same direction. How often will the three of them meet?
A.
Every 60 seconds
B.
Every 120 seconds
C.
Every 30 seconds
D.
None of these
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