What Is the Rate of Change of Momentum When Water Hits a Building?

[CASHMONEY]

Tried this problem, but not getting it.

Homework Statement

A fire hose sends 2528 gallons of water per minute against a building. The water strikes the building at 28 m/s and does not bounce back. What is the magnitude of the rate of change of momentum of the water?

Homework Equations

The Attempt at a Solution

I used the conversion factor of 1 gallon / 3.7856 L and 1 kg / 1 L to find how many kg of water per minute. Then divided by 60 to find how many kg of water per second. I got 159.5 kg of water per second. Then I multiplied by the velocity to get 4466, but I did not get it correct. Am I on the right track or missing something? PLEASE HELP!

 

[Shooting Star]

You seem to be doing it correctly. Check your arithmetic once more.