Question

Find the radius of a cone with volume 199.23 cm3 and height 9 cm.

Answer 1

@mathmale mind helping with another :)

Answer 2

U can look here to find formula for volume of cone

http://math.about.com/od/formulas/ss/surfaceareavol_2.htm

Answer 3

Plug in 199.23 for V
And 9 for h.
And then try to solve for r

Answer 4

V=1/3 * pie * r square * h
Plug in the variables you have and sole for r
Don't forget to square root it

Answer 5

ok im lost as to how to eliminate pi...

Answer 6

So
199.23=1/3(pi)(r^2)(9)

199.23 =3(pi)(r^2)
-------- --------
3pi. 3pi

66.41
------ = r^2
pi

Then square root both sides to find r

Answer 7

It'll be better to do it with a calculator

Answer 8

so its 4.5 :)

Answer 9

@nikato

Answer 10

Yea. Around there 4.5 or 4.6