Question

Find the surface area of a cone with a slant height of 11 and a radius of 15. Use 3.14 for π.
Answer

1222

1220

1225

1227

Answer 1

3.14*15*11=LA

Answer 2

B=pi*r^2

Answer 3

I gave you what you need, now solve the problem. :)

Answer 4

i did 3.14x15x11^2 and got 5,699.1 lol im confused

Answer 5

\[A= \pi r s + \pi r ^2\]

Answer 6

do you know how to use the pythagoras theorem??

Answer 7

is that the a^2 + b^2=c^2. If not then im not sure

Answer 8

yes...

Answer 9

oh sorry, you don't even need that to find the surface area...

Answer 10

Its ok. I just dont get how to set the problem up to where i can get the right answer.

Answer 11

you were given the radius and the slant height in your question....you were told to take the value of pi to be 3.14....
plug in the values into the formula to find the Surface area of the cone..

Answer 12

I keep getting 7,771.5

Answer 13

no...you are making a mistake.....i got a different answer.

Answer 14

I know im making a mistake just dont no where. Can u give me the full equation so i can enter in my calcultor and see what i was doing wrong. Thanks

Answer 15

\[A=\pi \times 15 \times 11 + \pi \times (15)^2\]

Answer 16

ok i see thanks (:

Answer 17

you are welcome....(:

Answer 18

Oh one more if you have time. I need to Find the surface area of a square pyramid with a slant height of 21 and a base side measure of 18. I dont know the equation form for this one eathier. (:

Answer 19

http://math.about.com/od/formulas/ss/surfaceareavol_5.htm

Answer 20

what do you get when you use the formula??

Answer 21

Im not quite sure what the formula is?

Answer 22

\[A=2bs + b^2\]
b=base
s=slant height

Answer 23

\[A= 2(18)(21)+2(18)^2\]
\[A=??\]

Answer 24

@xr67cat