Question

The first painter can finish a paint job in 2 hours. The second painter can finish the same job in 8 hours. How long would it take them to finish the job if they were working together?

Answer 1

1h 15minutes, I converted each time into fractions, 2hours to $\frac{2}{2}$ and the 8hour to $\frac{8}{8}$, this means, painter #1 finishes 1/2 of the project in 1 hour, and paither #2 finishes 1/8 of project in 1 hour, now when we make each fraction out of 2 hours, so $\frac{2}{2}$ and $\frac{2}{8}$, we add them and get $\frac{10}{8}$, then as mixed number, 1 1/4 which is 1 hour and 15min(1/4 of a hour) I believe im right.