Three persons begin to walk around a circular track. They complete their revo

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Question

Three persons begin to walk around a circular track. They complete their revolutions in \(15\frac{1}{6}\)seconds, \(16\frac{1}{4}\) seconds and \(18\frac{2}{3}\)seconds respectively. After what time will they be together at the starting point again?

Options:

A . 3460 second

B . 3660 second

C . 3440 second

D . 3640 second

Answer: Option D

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1 Comments

Md Arif 2017-12-17 14:04:11

0

L.C.M OF {15 1/6,16 1/4,18 2/3}
=L.C.M OF (91/6,65/4,56/3)
={L.C.M OF(91,65,56)}/{H.C.F OF(6,4,3)}
=3640/1
=3640 Sec.

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