Question

A and B together can do a piece of work in 10 days but A alone can do it in 15days how many days would B alone take to do the same work​

Answer 1

5 days

Step-by-step explanation:

let B can do this work in x days

now( x+15)/2= 10

or x+15=20

or x=5

Answer 2

Answer:

B can do it in 30 days

Step-by-step explanation:

1 day work done by a is 1/a

1 day work done by b is 1/b

together work is done in 10 days

so

(1/a) + (1/b) =1/10

(1/15)+(1/b)=1/10

(1/b)=(1/10)-(1/15)

(1/b)=(1/30)

b=30