Okay, here we have this:
We need to calculate the volume of a cylinder with 2 ft of radius and 21 ft of length, so let's replace in the following formula:
V=πhr²
V=π(21 ft)(2 ft)²
V=84π ft³
Here we obtain that the volume in terms of pi is 84π ft³, no let's round to the nearest hundredth:
84π ft³≈263.89 ft³.