a can do a piece of work in 20 days and B in 16 days they worked together on it for 8 days and then left how long will be take to finish the remaining work
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A will finish the remaining work in 2 days
the work done by A and B in 1 days = 1/20 + 1/16=9/80
the work done by A and B in 8 days = 8×9/80=9/10
remaining work = 1-9/10=1/10
A will finish the remaining work = 1/10÷1/20=1/10×20=2 days
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