12. A and B complete a work in 6 days and A alone can do the same work in 10 days
then B alone will do it in.
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Answer:
A and B can complete the work in = 6 days
A alone can complete the work in = 10 days
Total work = 1
One day work of A and B = 1/6
One day work of A alone = 1/10
One day work of B alone = 1/6 - 1/10
= (5-3)/30
=2/30
=1/15
B alone can complete the whole work in = 1 ÷ 1/15
= 15 days
B alone can complete the work in 15 days.
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