Question

141. A can do a piece of work in 20 days and B can do it in 30 days. How long will they
take to do the work together?

(A)10 days
(B)days12
(C)11 days
(D)20 days


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Answer 1

Answer:

12 days

Step-by-step explanation:

In 60 days, A would be able to do 3 pieces and B would be able to do 2 pieces.

Together they would be able to do 5 pieces of work in 60 days, so 1 piece of work would take 60/5=12 days.