# How many gallons of water does a 4' X 10' tank hold?

This cannot be answered as stated. There must be three
dimensions given: width/depth/height. Or we must assume that the
tank is "circular." More accurately, we assume the tank is a
cylinder that is four feet high and 10 feet in diameter. The volume
of a cylinder is given by the formula V = (Pi)r2h, where *r*
is the radius of the base of the cylinder and *h* is its
height. Since the radius is half the diameter, we get: V = (Pi) *
(52) * 4 = 3.141 x 25 x 4 = 314.1 cubic feet of water. The question
asked for the volume in gallons, however. One cubic foot of water
contains about 7.48 gallons. So 314.1 x 7.48 = 2349.9 gallons.

### On average, how much water does a water tank generally hold?

Most water tanks will be labled by size. That means how many gallons the tank hold is what it is called. A 100 gallon tank will be sold as such and a ten gallon tank will be labled that way. So just check the labels. Most water tanks hold about thirty gallons of water. Of course the bigger the tank the more water it will hold. And you can purchase apartment sized water tanks that…