Question

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

Answer 1

Answer:

there is a simple formula for that =(10×15)/(10+15)

=150/25=6 days

Answer 2

Step-by-step explanation:

first do

10 + 15

= 25

then divide it by 2

25 ÷ 2

= 12.5

it means A and B both can do the work in 12.5 days

I hope it helps you