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Quantitative Aptitude

Running in Circles

Philip, Tom a...

Question

Philip, Tom and Brad start jogging around a circular field and complete a single round in 18 seconds, 22 seconds and 30 seconds respectively. In how much time, will they meet again at the starting point?

A

3 minutes 15 seconds

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B

21 minutes

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C

16 minutes 30 seconds

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D

12 minutes

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E

None of these

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Solution

The correct option is C 16 minutes 30 seconds

The L.C.M. of 18, 22 and 30 is 990.
So, they will meet each other after 990, i.e., 16 minutes and 30 seconds.

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