A student said the volume of a cylinder with a 3 inch diameter is two times the volume of a cylinder with the same height and a 1.5 radius, what is the error?
so volume=height times pi times radius^2 v=(h)(pi)(r^2) so we shall see if it is true r=3 and r=1.5 (h)(pi)(3^3)=2 times (h)(pi)(1.5^2) we can divide both sides by hpi 3^3=2 times 1.5^2 9=2 times 2.25 9=4.5 false
the errror was that the person didn't take into account the squareing part in the volume formula
