Question

A and B together finish a work in 12 days. If A alone can finish the same work in 20 days, in how many days B alone can finish it ?

Answer 1

Step-by-step explanation:

(A+B) can do a work in 12 days

So,1 day work of (A+B) = 1/12

Similarly A's 1 day work = 1/20

and B's alone work = 1/B

Their together wok is A+B

So 1/20 + 1/B = 1/12

1/B = 1/12-1/20 = 2/60 =1/30

hence B can finish this work alone in1/1/30= 30 days

Answer 2

Answer:

b alone can finish the work in 30 days

Step-by-step explanation:

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