Question

PLEASE HELP
find the surface area for the given cylinder. Use 3.14/pi:
the cylinders base is 6ft and the length is 20ft

Answers:
a) 180ft
b) 720ft
c)433ft
d)135ft

Answer 1

The formula to find the SA of a cylinder is

A = 2pi*rh + 2pi*r^2

h = height
r = radius

I am guessing base length = diameter?

Answer 2

Radius = Half of Diameter

Answer 3

Kinda confusing. Got a picture?

Answer 4

yea hold on

Answer 5

Ok, thanks!

Answer 6

i was guessing on that answer

Answer 7

Yes. Our diameter is 6, so our radius would be..?

Answer 8

Remember. Radius = Half of Diameter

Answer 9

3

Answer 10

right?

Answer 11

The height is 20 and the radius is 3 right?

Answer 12

correct

Answer 13

@wolf1728

Answer 14

The area of the base is 3.14 * 3 * 3
= 28.26 square feet
We multiply this by the height which is 20 and we have
565.20 square feet

Answer 15

is 565.20 the answer?? @wolf1728

Answer 16

Let me recheck the math

Answer 17

because its not coming up on the multiple choice.. the answers are either A) 180ft
B) 720ft C)433ft D)135ft

Answer 18

if you scroll up in the comments i attached a picture of the question with the answer choices

Answer 19

lateral cylinder area = 2 * PI * radius * height
lateral cylinder area = 376.99

bottom area = 28.26 sq ft
total = 405.25 sq ft

Answer 20

hmm why is the multiple choice not having that answer??
@wolf1728

Answer 21

oh i got it you have to add the total and bottom area

Answer 22

Okay I just thought they wanted the area of the bottom
they want the area of the top and bottom so
top = 28.26
bottom = 28.26
side = 376.99

TOTAL = 459.25

Answer 23

NOPE - the total is 433.51

Answer 24

That's the third choice in the multiple choices