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15 men take 20 days to complete a job working 8 hours a day. The number of hours a day should 20 men take to complete the job in 12 days :

August 30, 2016 Quiz Questions

15 men take 20 days to complete a job working 8 hours a day. The number of hours a day should 20 men take to complete the job in 12 days :
[A]5 hours
[B]10 hours
[C]15 hours
[D]18 hours

10 hours
M_{1}D_{1}T_{1} = M_{2}D_{2}T_{2}
=> 15\times 20\times 8 = 20\times 12\times T_{2}
=> T_{2} = \frac{15\times 20\times 8}{20\times 12} = 10\ hours
Hence option [B] is correct answer.

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