A takes 15 days less than the time taken by B to finish a piece of work. Both A and B together start the work and finish it in 18 days. Find the time taken by B alone to finish the work.
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a= 15 days ,b=?a+b=18
work done by a in one day=1/15
work done by a+b in one day = 1/18
a will take more time to do the work
so 1/15-1/18=1/90
b will do work in one day =1/90
b will alone take 90 days
work done by a in one day=1/15
work done by a+b in one day = 1/18
a will take more time to do the work
so 1/15-1/18=1/90
b will do work in one day =1/90
b will alone take 90 days
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