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# How do I find the radius of a sphere, given the volume?

V= 9/2

So 9/2=4/3 pi r^3

But with my poor taste for math, that's about as far as I can get....

### 4 Answers

- 1 decade agoFavorite Answer
volume of a sphere= 4/3(pi)r(cubed)

**sorry for lack of the right symbols

so, in tht formula, r = radious

if the volume is 9/2 you can plug tht into the formula:

9/2 = 4/3(pi)r(cubed)

then solve using algebra

hope i helped

wow, sry, i just realized u already got tht far.

u can divide 9/2 (which is also 4.5) by 4/3

u shud have 3.375...

3.375 = pi r cubed

then divide by pi

screw tht, ur answer is (about) 1.2

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- 1 decade ago
9/2 = 4/3 pi r^3

then

9/2 x 3/4pi = r^3

27/8pi = r^3

then just cube root 27/8pi that's the radius..

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- Anonymous1 decade ago
ok, so from that

you need to move the rest over to the other side

(so that the unknown, being R, is by itself)

so you move 4/3 pi over

then you move the cubed sign over

(cubed root)

that should be it

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