Question

A and B can do a piece of work in 4 days, while C and D can do the same work in 12 days. In how many days will A, B, C and D do it together?​

Answer 1

Answer:

hi

your answer is here !

Step-by-step explanation:

A, B, C and D will together take ¼ + 1/12 = 4/12 = 1/3

⇒ 3 days to complete the work.

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Answer 2

Answer:

A and B is 12/4 = 3 times more efficient than C and D

so let days = x

x ( 1 + 0,33) = 4

x = 4/1,33 = 3 days

Step-by-step explanation:

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