A can do a piece of work in 20 days and B can do it in 30 days and C can do it 10 days. They started the work together and A leaves after 2 days and C leaves after 4 days from the beginning. How long will work lost?
Choose the correct choice from the following
A) 13  B) 16  C) 25  D) 14  E) 15
2/20 + x/30 + 4/10 = 1   x = 300/20= 
<gadget id="calculator">300/20</gadget>
<output>15</output>
15   Answer: 15
<result>E</result>
A can do a piece of work in 20 days and B can do it in 30 days and C can do it 10 days. They started the work together and A leaves after 2 days and C leaves after 4 days from the beginning. How long will work lost?