Just because it is approximately 60x30x10 doesn't mean it's a perfect rectangle. Also we have no way of knowing the shape of the pond's floor, it could just be 10' at the deepest part and the rest could be more shallow, so there is no way of figuring out even an approximation of the pond's volume based on the information that has been given.
Then why did you read it, just to post that useless comment? And if you call something stupid, it's a good idea to make sure your spelling is correct, otherwise that just makes you a hypocrite...