Calculating Work Done by a 2HP Engine to Pump Water

[dreamgirl]

Homework Statement

A 2 Horsepower engine runs a water pump for 24 hours

a. What is the work done by the engine?
b. What would happen if a 1.0 horsepower was used to pump the same amount of water?

W= F * D

But i don't know what D is? so how must i solve this?
please help! :[

 

[Pengwuino]

Here's a hint, horsepower is not a force. It is actually a unit of power.