A finishes a task in 15 days. but with the help of b he finishes the same work in 12 days.how much time b alone will take to finish the work
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Work done by A =1/15
Work done by A and B =1/12
Work done by B =1/12-1/15=1/60
Work done by B =60
Work done by A and B =1/12
Work done by B =1/12-1/15=1/60
Work done by B =60
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