Question

a and b can do a piece of work in 10 days. A alone can complete this work in 15 days
In how many days B can do it alone.​

Answer 1

Step-by-step explanation:

(A + B)'s together 1day work = 1/10

A's 1day work = 1/15

B's 1day work = (A + B)'s together 1day work -

A's 1day work

= 1/10-1/15

= (3-2)/30

= 1/30

So B alone can a piece of work in 30days