Question 107642
Remember, if the diameter is 30, then the radius is 15


The volume of a cylinder can be found by the formula
{{{V = pi*R^2*H}}}


Now plug in {{{R=15}}} and {{{H=48}}}


V = {{{pi*15^2*48 = 33929.20062}}}



Edit: Now divide that result by 231 to convert from cubic inches to gallons to get {{{33929.20062/231 = 146.87}}}. So the tank can approximately hold 147 gallons (after rounding). Note: 1 gallon = 231 cubic inches.