Question

What is the surface area of the cone to the nearest tenth? The figure is not drawn to scale.thank you ! :)

Answer 1

To calculate the surface area of a cone we can use the following formula:

`S=\pi r^2+\pi Lr`

where r represents the radius of the base and L represents the slant height.

The radius of our cone is 7cm and the slant height 19cm, using those values on the formula we have our answer:

`S=\pi(7)^2+\pi(19)(7)=49\pi+133\pi=182\pi\approx571.8`

The surface area of this cone is 571.8 cm².