Originally Posted by **symstar** I couldn't manage to figure this one out on my own. A heavy rainstorm dumps 1.0cm of rain on a city 9km wide and 4km long in a 2hr period. How many metric tons ( 1 metric ton = 10^3kg) of water fell on the city? (1cm^3 of water has a mass of 1g = 10^-3kg.)
Edit: Turns out I had the right answer but left too many sig figs which was why I was getting it wrong |

The volume of water can be represented by a rectangular solid 1 cm x 9 km x 4 km. So you can use $\displaystyle m = \rho V$, where $\displaystyle \rho$ is the density of water, to determine the mass of the water that fell on the city, then convert that to metric tons. I'm getting 360000 metric tons.

-Dan