A and B together can complete a piece of work in 4 days .if a alone can complete the same work in 12 days , in how many days can b alone complete that work?
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A and B together can complete a piece of work in 4 days .if a alone can complete the same work in 12 days , in how many days can b alone complete that work?
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Answer:
A's 1 day work =1/12
let B' s 1 day work be 1/x then
1/12+1/x=1/4( A and B' s 1 daywork)
1/x=1/4-1/12
1/x=3/12-1/12
1/x=2/12
= 1/6
therefore B will take 6 days