Geometry
posted by Shay .
How tall would a glass (in the shape of a right circular cylinder) with a diameter of 3 inches need to be to hold 12 oz?

Ounces of what? Water? Metal ball bearings? That weight would translate to different volumes depending on the substance.

Did not specify substance

r= 1/2 diameter
here's the formula for the volume of a right circular cylinder:
V = pi*r^2*h
Find h.