A and B together can complete a piece of work in 12 days. They worked together for 5 days and then A alone finished the rest work in 14 days. A alone can complete the work in

Explanation:

A and B together can complete the work in 12 days. They work for 5 days. So 7 days work of A + B is left and which is done by A in 14 days.

According to question,

(A+B)7=A×14

7A+7B=14A

7B=7A

A : B = 1 : 1

Now,(A+B)12=A×D

(1+1)12=1×D

D = 24 days