If 12 men and 16 boys can do a piece of work in 5 days and 13 men together will 24 boys can do it in 4 days. Compare the daily work done by a man with that of a boy?	Choose the correct choice from the following answers.
A) 2:5	B) 2:9	C) 2:4	D) 2:1	E) 2:2
12M + 16B ----- 5 days   13M + 24B ------- 4 days   60M + 80B = 52M + 96B   8M = 16B =&gt; 1M = 2B   M: B = 2:1   Answer:2:1
<result>D</result>
If 12 men and 16 boys can do a piece of work in 5 days and 13 men together will 24 boys can do it in 4 days. Compare the daily work done by a man with that of a boy?