What is the volume of pool thirty feet long eighteen feet wide and four feet deep?
The volume is 30 feet x 18 feet x 4 feet = 2,160 CUBIC feet. OR... 2,160 foot3 x 7.4805 GALLONS/foot3 = 16,157.88 Gallons.j3h.
There are 7.48 gallons of water in a cubic foot, so the answer is 1,000,000 / 7.48 = 133,690 ft3 Using approximate figures, if your lake is an average of thirty feet deep and fifty feet wide, it would have to be about ninety feet long. If you are in the UK, your lake would be 160,543 ft3 and thirty feet deep, fifty feet wide and one hundred and seven feet long.