A can do a piece of work in 10 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?
Pick one
A) 10 2/8  B) 10 2/9  C) 10 2/3  D) 10 2/2  E) 10 2/1
2/10 + 4/15 + x/20 = 1   x = 32/3 = 10 2/3   Answer: 10 2/3
<result>C</result>
A can do a piece of work in 10 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?