The radius of a cylinder is 15 cm. The volume of the cylinder, found using 3.14 to
approximate pi, is 19,782 cm3.
What is the height of the cylinder?
Express your answer as a whole number.
cm

Question

The radius of a cylinder is 15 cm. The volume of the cylinder, found using 3.14 to
approximate pi, is 19,782 cm3.
What is the height of the cylinder?
Express your answer as a whole number.
              cm

anonymous · Answer

The volume of cylinder is?
V=πr^2h

so you have volume, radius and you obviously know the constant Pi 

so now make h as the subject

h= V/πr^2 

= ???

anonymous · Answer

V = pi * r^2 * h

Plug in what we know:

19782 = 3.14 * 15^2 * h

Solve for h

jokersmart · Answer

Sorry for my inactiveness. I had to go eat lunch. cx
is h 28??

anonymous · Answer

Yes, it is.

anonymous · Answer

:D

jokersmart · Answer

So 28 is the answer...?

anonymous · Answer

yup

jokersmart · Answer

Thank you both! 8D

anonymous · Answer

3.14 * 15^2 = 706.5

19782 / 706.5 = 28

anonymous · Answer

Np, happy to help.

anonymous · Answer

what @iGreen said is exactly the same thing as I said in my 1st post 
it's all about making h as the subject and know what are the values you know 
be confident! :)

igreen · Answer

@nopen I'm @iGreen not @iGreen.

anonymous · Answer

um.... I don't see the difference :|

anonymous · Answer

LOL

igreen · Answer

The previous person(who's still me :P) has a period..just click on me and him and you'll see that our fans and sub-scores are different.

anonymous · Answer

Oh dear...hahaha alrighty sir

igreen · Answer

Lol, I broke the fastest 99 record on that account :P

18 days