Question

A cone with a radius of 8 feet and a slant height of 17 feet is shown below.



What is the surface area of this cone? Use 22/7 for pi.

628.57 square feet

427.43 square feet

1,335.71 square feet

854.86 square feet

Answer 1

are=pie.r^2+pie.r.s
22/7.8.8+22/7.8.17
=628.0

Answer 2

\(a^2+b^2=c^2\)
where c = 17 ft
and a = r = 8 ft

Answer 3

\[\text{Volume} = \frac{\pi r^2 h}{3}\]
\[\text{Surface Area} = \pi r s + (\text{Area}_{\text{circle}}) = \pi r s + \pi r^2\]

s = c = 17 ft

Answer 4

You should now be able to find either volume or surface area @NyKole ^_^

Make sense?

Answer 5

Maybe this will make it more interesting then... :-P
http://media.giantbomb.com/uploads/0/6087/1089291-conehead_zombie_large.jpg

Answer 6

is the answer A?

Answer 7

@agentx5

Answer 8

\(\text{Surface Area} = \pi (8 \ ft)(17 \ ft) + \pi (8 \ ft)^2\)
\(\text{Surface Area} = 136\pi \ ft^2 + 64\pi \ ft^2\)
\(\text{Surface Area} = 200\pi \ ft^2 \approx 628 \ ft^2\)
Correct! Good job

(see how the units work btw? foot * foot = feet squared)

Answer 9

The precise answer would be "200\(\pi\) ft\(^2\)" :-) That's what my boss would want if I was engineering something like this. Any contractor making the item can use a little calculator on-site to figure out how accurate they want to get.