Question

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

Answer 1

1 day work of A and B = 1/10
1 day work of A = 1/15

1/10=1/15+B
=>1/10-1/15=B
=>3-2/30=B
=>1/30=B

1 day work of B = 1/30
So , B would do the work in 30 days