Question

Someone pls help with volume of cylinder?

Answer 1

v = pi * r^2 * h

Answer 2

Yes, i know.

Answer 3

But it isn't that

Answer 4

that is the formula, what do you need then?

Answer 5

The volume of a cylinder, found using 3.14 to approximate pi, is 30,395.2 cm3. The radius of the cylinder is 11 cm.



What is the height of the cylinder?

Express your answer as a whole number.



cm

Answer 6

wouldn't you have to divide 30,395.2 by 11^2?
because i did that last time and i got it wrong.

Answer 7

Ok, so plug in what you got.

Volume = 3.14 * r^2 * h

30,395.2 = 3.14 * 11^2 * h

Now simplify. What is 11^2??

Answer 8

121

Answer 9

@sammixboo how old are you?

Answer 10

Right so we have

30,395.2 = 3.14 * 121* h

Now still simplifying what is 3.14*121

Answer 11

380

Answer 12

rounded

Answer 13

30395.2 / 379.94 = ??

Answer 14

Good, but let's not round. So we have

30,395.2 = 379.94 * h

To solve this divide 379.94 on both sides of the equation

30,395.2 / 379.94 = 379.94 * h / 379.94

30,395.2 / 379.94 = h

Answer 15

80!

Answer 16

Thanks you guys

Answer 17

No problem