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3 years ago

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

Mathematics

1 answer:

Blizzard [7]3 years ago

6 0

Answer:

467.99 units²

Step-by-step 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

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

$A=\pi 8(8+\sqrt{49+64})$

$A=\pi 8(8+\sqrt{113})$

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

$A=\pi 8(18.63)$

$A= (3.14)(8)(18.63)$

$A= (25.12)(18.63)$

$A= 467.99$ units²

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3 years ago

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