2 men and 4 boys can complete a work in 4 days. 5 men and 6 boys can complete the same work in 3 days. The work done by 2 boys is equal to the work of how many men?
Select:
A) 4
B) 5
C) 6
D) 7
E) 8
Exp: (2m + 4b)’s one day’s work = 1/4   (5m + 6b)’s one day’s work = 1/3   =&gt; (8m + 16b)’s one day’s work = (15m + 18b) ’s one day’s work   =&gt; 7 men’s work = 2 boy’s work   So, we should be employ 5 more men to be completed the work.   Answer: 5
<result>B</result>
2 men and 4 boys can complete a work in 4 days. 5 men and 6 boys can complete the same work in 3 days. The work done by 2 boys is equal to the work of how many men?