A cone has a perpendicular height of 12cm and slant height of 13cm. Calculate it's total surface area (take pie r =3.142)?
The surface area is 282.78
The perpendicular height,
The total surface area of a cone,
The formula for the lateral surface area is
The formula for the area of the base is
Substitute Equations IV and V into Equation III.
Substitute Equations I and II into Equation VII.
Now evaluate with