9 men can do a work in 12 days working 4 hours a day. In how many days can 6 men do the same work, working 8 hours a day?	Choose the correct choice from the following choices:
A) 18 B) 9 C) 10 D) 8 E) 11
We have, M1D1H1 = M2D2H2   So, 9*12*4= 6*D2*8   D2 = 9*12*4/6*8 = 9   ANSWER:9
<result>B</result>
9 men can do a work in 12 days working 4 hours a day. In how many days can 6 men do the same work, working 8 hours a day?