(think this is the right section).

I'm stuck on a question in a physics paper:

Water of density $\displaystyle 1000kg\,m^{-3}$ flows out of a garden hose of cross-sectional area $\displaystyle 7.2\times 10^{-4} m^2$ at a rate of $\displaystyle 2.0 \times 10^{-4} m^3$ per second. How much momentum is carried by the water leaving the hose per second?

I think it may have something to with $\displaystyle F=ma$ and $\displaystyle F \Delta t = \Delta mv$. Maybe somehow using the rate of flow to work out acceleration and density to find mass but I'm clutching at straws there.

Thanks

edit, oh and probably $\displaystyle \rho = \frac{m}{V}$