X can do a piece of work in 20 days and y can do a piece of work in 30 days.they work together in 6 days then how much work left ?
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All the work is finished
x's one day work= 1/20
y's one day work = 1/30
both one day work=1/20+1/30
=1/6
in 6 days all the work is finished.
x's one day work= 1/20
y's one day work = 1/30
both one day work=1/20+1/30
=1/6
in 6 days all the work is finished.
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