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I know that for a cone = and = . From this find out of the cone.

`pi = `
 
 
SolutionCone FormulaVolume Formula
Volume of Cone
Height `(h) = sqrt(l^2 - r^2)`
Curved Surface Area `(CSA) = pi r l`
Total Surface Area `(TSA) = pi r (l + r)`
Volume `(V) = (pi r^2 h)/3`

Example :
I know that for a cone Radius = 3 and Length = 5 . From this find out Volume of the cone.

`"Here, we have Radius "(r) = 3" and Slant Height " (l) = 5" (Given)"`

`l^2 = r^2 + h^2`

`h^2 = l^2 - r^2`

`h^2 = 5^2 - 3^2`

`h^2 = 16`

`h = 4`


`"Volume" = (pi r^2 h)/3`

` = (pi * 3^2 * 4)/3`

` = 37.6991`


`"Total Surface Area" = pi r (l + r)`

` = pi * 3 (5 + 3)`

` = 75.3982`


`"Curved Surface Area" = pi r l`

` = pi * 3 * 5`

` = 47.1239`


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