# Using two pumps

An 8-horsepower (hp) pump can fill a

tank in 8 hours. A smaller, 3-hp pump fills the same tank in

12 hours. The pumps are used together to begin filling this

tank. After four hours, the 8-hp pump breaks down. How

long will it take the smaller pump to fill the tank?

## Hi, Ramel!

## @fitzmerl duron Nice detailed

In reply to Hi, Ramel! by fitzmerl duron

@fitzmerl duron Nice detailed solution! :)

@Ramel In addition, a tabular form should help you visualize the rates, the times and the work = rate × time. :)