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?
1. 12 days
2. 4 days
3. 3 days
4. 2 days
5. None of these
Answers
Answered by
5
Answer:
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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.
option (c) 3 days right answer !
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Answered by
2
A and B can do a work = 4 days
A and B 1 day work = 1/4
C and D can do work = 12
C and D 1 day work = 1/12
A,B,C,and D 1 day together work = 1/4 + 1/12 = (3+1)/12 = 4/12 = 1/3
so A ,B ,C and D togather work = total work /one day work = 1/1/3 = 3 days
option 3 is right .
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