Question

Find the surface area of a cone with a radius of 2.7 cm and a slant height of 8.3 cm, to the nearest square unit. Use 3.14 for p.
a.
116 cm2
b.
164 cm2
c.
93 cm2
d.
58 cm2

Answer 1

Alright so what our area?

Answer 2

@some.random.cool.kid you think you can help me with this problem

Answer 3

I can certainly try! :D

Answer 4

alright @some.random.cool.kid

Answer 5

A=πr(r+h2+r2)

Answer 6

you have your height as 8.3

Answer 7

so fill this in A=πr(r+h2+r2)=π·2.7·(2.7+8.32+2.72)

Answer 8

ok

Answer 9

well first you are is A≈96.94cm²

Answer 10

oh yeah ok

Answer 11

oh yeah ok

Answer 12

ok

Answer 13

alright so do you think you can try the next step on your own? I will be trying to solve it while you do k.

Answer 14

alright

Answer 15

explanation



r = 2.7 m
h = 8.3 m
s = 8.72812 m
V = 63.3628 m3
L = 74.0345 m2
B = 22.9022 m2
A = 96.9367 m2

I believe you multiply this to get part however 96.94 x 8.3 wont give you your answer their is another step I believe.
radius x height = 22.41 I belive your closet answer is 93cm^2 But can also be 164cm^2 so please challenge me if im wrong but its between both of those answers.

Answer 16

@Nnesha or @nincompoop you guys might able to explain this better than I ...

Answer 17

got it i believe your answer is 93

Answer 18

I used woldfram and found the answer to the area I was confused at first but then figured it out.

Answer 19

hope this helped @michael305