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