Question 389159


{{{V=(1/3)*pi*r^2*h}}} Start with the volume of a cone formula.



{{{V=(1/3)*pi*(3)^2*(9)}}} Plug in {{{r=3}}} and {{{h=9}}}



{{{V=(1/3)*(3.14)*(3)^2*(9)}}} Replace {{{pi}}} with {{{3.14}}} (note: Use more digits of {{{pi}}} to get better accuracy).



{{{V=(1/3)*(3.14)*(9)*(9)}}} Square {{{3}}} to get {{{9}}}



{{{V=(1/3)*(28.26)*(9)}}} Multiply {{{3.14}}} and {{{9}}} to get {{{28.26}}} (this figure is approximate).



{{{V=(1/3)*(254.34)}}} Multiply {{{28.26}}} and {{{9}}} to get {{{254.34}}} (again, this is approximate).



{{{V=84.78}}} Multiply {{{1/3}}} and {{{254.34}}} to get {{{84.78}}}



So the volume of the cone with radius of {{{3}}} inches and height of {{{9}}} inches is approximately {{{84.78}}} cubic inches.