Question

A and B together can finish a piece of work in 12 days. If‘A’alone can finish the same
work in 20days, in how many days B alone can finish it?
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Answer 1

Answer:

Let the time taken by B be x.

1/x + 1/20 = 1/12

1/x =  1/12- 1/20

1/x= 5-3/60

1/x= 2/60

1/x= 1/30

x=30.

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