A and B together can do a piece of work in 8 days, but A alone can do it in 12 days. How many days would B alone take to do the same work?
Work done by A and B together in 1 day =18 of the work
Work done by A in 1 day =112 of the work
Work done by B in 1 day =18−112=3−224=124
Number of days taken by B alone to do the same work
=1124=24days