If 7 men and 2 boys working together, can do six 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 most appropriate option:
A) 2:5
B) 2:3
C) 1:8
D) 4:1
E) 3:2
7M + 2B = 6(1M + 1B)   7M + 2B = 6M + 6B   1M = 4B   The required ratio of work done by a man and a boy = 4:1   Answer:4:1
<result>D</result>
If 7 men and 2 boys working together, can do six 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?