Question

A can do a piece of work in 15 days while B can do it in 10 days. How long will they take together to do it?​

Answer 1

Answer:

I think they take 5 days

Step-by-step explanation:

if a can do in a 15 days

or b can do in a 10 days so

we both can do in 5 days

15

-10

__

5

Answer 2

Answer:

=  6 days

Step-by-step explanation:

A can do peice of work in 15 days.

B can do peice of work in 10 days.

then together they can do it in x days.

1/x​ = 1/15 + 1/10​

1/x​ = 3+2​/30 =1/6

x=6 days. together they can do work in 6 days.