A and B can do a piece of work in 20 days and 12 days respectively. A started the work alone and then after 4 days B joined him till the completion of the work. How long did the work last ?

Chandan Das • 6.78K Points
Tutor III Math

Q. A and B can do a piece of work in 20 days and 12 days respectively. A started the work alone and then after 4 days B joined him till the completion of the work. How long did the work last ?

(A) 20 days
(B) 15 days
(C) 6 days
(D) 10 days

Correct Answer - Option(D)

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