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A .B and C start walking around a circul...

A .B and C start walking around a circular track.A completes one round in 91/6 seconds B completed in 65/4 sec and C completes in 56/3 sec respectively after how many sec will they meet each other at the starting point again?

A

3460 s

B

1820 s

C

3640s

D

none of these

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