Question

A and B can do the work in 10 & 15 days the number of days working together?

Answer 1

let the work of A for one day be 1/10

let the work of B for one day be 1/15

work done together = 1/10+1/15

= 25/150

=1/6

if work is done together it will be completed in 6 days

Answer 2

A and B complete the work together in 6 days