A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. A alone can finish the remaining work in geek
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work done by B in one day=1/10
work done by B in 5 days=(1/10)*5=1/2
work left = 1/2
Time taken by A To complete the work=15 days
Time taken by A To complete 1/2 work =15*(1/2)=7.5
work done by B in 5 days=(1/10)*5=1/2
work left = 1/2
Time taken by A To complete the work=15 days
Time taken by A To complete 1/2 work =15*(1/2)=7.5
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