Question 880436
Formula for frustrum of  cone volume:  {{{v=((pi*h)/3)(R^2+rR+r^2)}}};
Formula for volume of cylinder: {{{v=h*pi*r^2}}}.


I suggest make some changes in variable names, and solve symbolically for "h" of the cylinder equation, and then substitute the given values.  I say this implying to be careful to not confuse the similar variables found in the fundamental formulas.