Question 10201
Well, you've got the right formula for the volume of a rectangular prism.

Now all you do is to put the given dimensions into the formula and do the math.

I'll start you off.

{{{V = l*w*h}}} In this case, l = 50 meters, w = 19.5 meters, and h (the depth) = 3 meters.

{{{V = (50 m)(19.5M)(3 m)}}} See if you can work this out, it's straight multiplication and the answer will be in cubic meters (m^3) of water, not in gallons of water.