Question

Find the surface area of the cone in terms of π. Rest in comments.

Answer 1

A. 112 π cm
B. 128 cm
C. 256π cm
D 160π cm

Answer 2

Now I am not getting that answer:
Surface Area (SA) = Lateral Area (LA) + area of base (B)
LA - 1/2 x 2πr x l
LA = 1/2 x 2π x 3 x 17
LA = 51π
B = πr^2
B = π x 3^2
B = 28.27433388
SA = (51π) + 28.27433388
SA = 79.27433388π

Answer 3

SA = pi*r*s + pi * r^2

Answer 4

well, that sure makes a difference... haha

Answer 5

SA = 3*17 pi + 3^2pi

Answer 6

ah okay... btw, to make the pi sign, press Alt 227 on your number pad :)

Answer 7

π cool

Answer 8

OKay, how do i add the two pis? do?

Answer 9

whoops, the do? wasnt supposed to be there :)

Answer 10

think of the π as a variable

Answer 11

so π^2? how would i get rid of the ^2?

Answer 12

51π + 9π = 60π

Answer 13

just square the 3 not the π

Answer 14

ahhhh, okay got it! Thanks!

Answer 15

yw

Answer 16

of course not one of your answer choices...

Answer 17

again...

Answer 18

SA = 3*17 pi + 3^2pi

SA = 3 x 17π + 9π
SA = 60π

Answer 19

?

Answer 20

haha, ikr! my teacher is... yeah, just no... haha :)

Answer 21

its all good.... lol

Answer 22

:) so,just to make sure, SA= 60π, right?

Answer 23

yes

Answer 24

Sweet, okay thanks for all your help, another question is about to come up, though, haha

Answer 25

lol