If 9 men and 2 boys working together, can do eight 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) 1:3
C) 5:8
D) 6:1
E) 7:2
9M + 2B =8(1M + 1B)   9M + 2B = 8M + 8B   1M = 6B   The required ratio of work done by a man and a boy =6:1   Answer:6:1
<result>D</result>
If 9 men and 2 boys working together, can do eight 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?