Question

Find the surface area of the cone radius 8 height 7 . Use 3.14 for pi. Explain everything.

Answer 1

467.99 units²

Explanation:

The formula for finding the surface area of a cone is:

`A=\pi r(r+\sqrt{h^(2)+r^(2)})`

Our values are:

r = 8

h = 7

π = 3.14

Let's plug the values into the formula

`A=\pi 8(8+\sqrt{7^(2)+8^(2)})`

`A=\pi 8(8+√(49+64))`

`A=\pi 8(8+√(113))`

`A=\pi 8(8+10.63)`

`A=\pi 8(18.63)`

`A= (3.14)(8)(18.63)`

`A= (25.12)(18.63)`

`A= 467.99`units²