A can do a piece of work in 24 days and B can do it in 15 days and C can do it 20 days. They started the work together and A leaves after 2 days and B leaves after 4 days from the beginning. How long will work lost? Answers
A) 10	B) 12	C) 13	D) 11	E) 15
2/24 + 4/15 + x/20 = 1   x = 13 Answer: 13
<result>C</result>
A can do a piece of work in 24 days and B can do it in 15 days and C can do it 20 days. They started the work together and A leaves after 2 days and B leaves after 4 days from the beginning. How long will work lost?