Question

lex designed the model of a cylindrical water tank to be installed in a park. The model has a radius of 4 cm and a height of 12 cm. The dimensions of the actual water tanks that will be installed in the park are 5 times larger than the model. The total surface area of the actual water tanks, rounded to the nearest whole number, is _________ cm2.

Use for pi. Do not type a comma in your response. For example, an answer of 1,000 would be given as 1000.

Answer 1

Do you know the total SA formula?

Answer 2

This should help,
http://0.tqn.com/d/math/1/5/F/F/Cylinderr.gif

Answer 3

2*pi*r ^2 + 2*pi*r*h ?

Answer 4

Yes. now insert the values.

Answer 5

2*3.14*18 + 2*3.14*4*12 = 17338.8
is the larger one 86694?

Answer 6

if you round the first cylinder to the nearest tenth

Answer 7

Did u found the surface area of the smaller cylinder?

Answer 8

yes, the first equation is the smaller cylinder. then i multiplied it by 5

Answer 9

im getting 2072

Answer 10

How did you get 2072?

Answer 11

sa of the normal cylinder = 414.8

414.8 * 5 = 2072

Answer 12

normal = model.

Answer 13

I just got 15473 and i knoww

Answer 14

lol, am I multiplying too many numbers?

Answer 15

might be. lol.

Answer 16

What numbers did you use to get 414.8?

Answer 17

Do you mind typing the equation

Answer 18

The same numbers you wrote,
(2*3.14*18 + 2*3.14*4*12)

Answer 19

lol, I got 15445.7856 and i think the 18 is supposed to be 16 because 4=r 4^2=16?

Answer 20

2*3.14*18 + 2*3.14*4*12

113*04 + 301.44

Answer 21

OHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH! I've been multiplying it!

Answer 22

wait, why is it 18?

Answer 23

ikr.

Answer 24

you wrote 18. lol.

Answer 25

Let me do it again.

Answer 26

2 * 3.14 * 4^2 + 2*3.14*4*12

Answer 27

Wait, I've been getting the same number. the 15445.78

Answer 28

I made sure I added it

Answer 29

2 * 3.14 * 4^2 + 2*3.14*4*12

401.92
for model.

Answer 30

2009.5?

Answer 31

2009.6