a cylinder whose diameter is 6 cm and whose height is 4 cm what is the volume?
The AREA the cylinder covers is pi r^2 multiply this times the HEIGHT to get VOLUME
pi (3^2) x 4 = 113.04 cm^3
VOLUME=pi*r^2*h
(h=height)
(r=radius)
diameter=6 so radius=3
pi*radius^2= 9pi (keep it exact to avoid chances of error)
Times that by the height=9pi*4=36pi
Convert=113
In college your answer will be considered WRONG if you don't include units ...you MAY get PARTIAL CREDIT though.....put 'em in there!