X can do a piece of work in 10 days and Y can do it in 15 days and Z can do it 20 days. They started the work together and X leaves after 2 days and Y leaves after 4 days from the beginning. How long will work lost?

Ques:- X can do a piece of work in 10 days and Y can do it in 15 days and Z can do it 20 days. They started the work together and X leaves after 2 days and Y leaves after 4 days from the beginning. How long will work lost?

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