8 men can dig a pit in 20 days. If a man works half as much again a s a boy, then 4 men and 9 boys can dig a similar pit in:
Choose the correct choice from the following answers:
A) 10 days B) 12 days C) 15 days D) 16 days E) 20 days
Explanation:   1 work done = 8 × 20   1 man = 3/2 Boys   1 boy = 2/3 men   Then, 9 boys = 9 × 2/3 men = 6 men   Then, 4 men + 9 boys = 10 men   Then, 8 × 20 = 10 × ?days   ? days = 8 × 20/10 = 16 days.   Answer: Option 16 days
<result>D</result>
8 men can dig a pit in 20 days. If a man works half as much again a s a boy, then 4 men and 9 boys can dig a similar pit in: