If 4 men and 1 boy working together, can do two times as much work per hour as a man and a boy together. Find the ratio of the work done by a man and that of a boy for a given time?  Choose the correct choice from the following: A) 3:2 B) 2:1 C) 3:3 D) 1:2 E) 6:1
4M + 1B =2(1M + 1B)   4M + 1B = 2M + 2B   2M = 1B   The required ratio of work done by a man and a boy = 1:2   1:2
<result>D</result>
If 4 men and 1 boy working together, can do two times as much work per hour as a man and a boy together. Find the ratio of the work done by a man and that of a boy for a given time?