8 men can do a piece of work in 12 days. 4 women can do it in 48 days and 10 children can do it in 24 days. In how many days can 10 men, 20 women and 10 children together complete the piece of work?	Pick one
A) 5 days	B) 15 days	C) 28 days	D) 4 days	E) 7 days
Explanation:   1 man’s 1 day’s work = 1/8 × 12 = 1/96   10 men’s 1 day’s work = 1 × 10/96 = 5/48   1 woman’s 1 day’s work = 1/192   20 women’s 1 day’s work = 1/192 × 20 = 5/48   1 child’s 1 day’s work = 1/240   10 children’s 1 day’s work = 1/24   Therefore, (10 men + 20 women + 10 children)’s 1 day’s work = 5/48 + 5/48 + 1/24   =1/4   The required No. of days = 4 days   Answer: Option 4 days
<result>D</result>
8 men can do a piece of work in 12 days. 4 women can do it in 48 days and 10 children can do it in 24 days. In how many days can 10 men, 20 women and 10 children together complete the piece of work?