Question

What is the surface area of this cone?

Use 3.14 and round your answer to the nearest hundredth.

Answer 1

Area=3992.87

Explanation:

Using formulas

Given Diameter d=38

so Radius is d/2 ; r=d/2=38/2=19

r=19

Area=
`\pi`rl+
`\pi`
`r^2`

`l=√(r^2+h^2)`

`l=√(44^2+19^2) \\l=√(2297)\\ l=47.9270`

`A=(3.14)(19)(√(2297))+(3.14)(19)^2 \\A=3992.86648\\`

Rounding to the nearest hundred is 3992.87