pi*r*h2 is an expression.
On the basis of conventions, one might assume that r is a radius, and h is a height. Since both these are measures of length, the overall expression has dimensions [L]*[L2] = [L3], that is, the dimensions of a volume.
Common shapes with one measure of radius and a height are cylinders, cones, sections of a sphere but the above expression does not refer to the volume of such a shape.
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PIE!
the value of pie=22/7, or 3.14, or 180. 4 pie= 4*22/7, or 3.142*4, or 180 *4. square of 4 pie= 7744/49, or 158.022, or 518400.
If you really mean, "Pie" then the square root must be some cherry pie filling, some sugar, and a little flour. If you mean that mathematical constant, "Pi", then its square root is approximately 1.7725.
it doesn't
rasberry filling