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Finding LCM of Two Numbers

Ram and Shyam...

Question

Ram and Shyam run one round of circle in 3 and 4 minutes respectively. If they both start together, after what time will they meet for the $6^{t h}$ time?

A

84 minutes

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B

78 minutes

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C

72 minutes

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D

80 minutes

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Solution

The correct option is C 72 minutes
The time they will meet for the first time = LCM of 3 and 4 = 12 min

$∴$ They meet for the 6th time after 12 x 6 = 72 min.

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