1.

A and B together can do a piece of work in 12 days and A alone can complete the work in 18 days. How long will B alone take to complete the job ?

Answer» In a day, A and B together can do 1 /12th of the work. In a day, A alone can do 1/18th of the work.
`:.` In one day, work done by B alone is `=(1)/(12)-(1)/(18)=(1)/(36)`
`:.` B alone can complete the work in 36 days.


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