3 workers transfer a tool weighing 120kg in 12 seconds. How many men are required to transfer it in 9 seconds?	Pick one
A) 4	B) 5	C) 6	D) 7	E) 8
We have, M1D1H1 = M2D2H2   3*120*12 = M2*120*9   M2 = 3*120*12/120*9 = 4   4NSWER:4
<result>A</result>
3 workers transfer a tool weighing 120kg in 12 seconds. How many men are required to transfer it in 9 seconds?