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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2010-06-21 05:00:35

lakeheadca
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Find Sphere Volume

A sphere is inside a cube. What is volume of sphere?
I don't remember exactly what was the question, perhaps they gave the volume of cube i.e: 100.
thank you

 

#2 2010-06-21 05:21:23

bobbym
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Re: Find Sphere Volume

Hi;

http://etc.usf.edu/clipart/42200/42278/spherecube_42278_lg.gif

Like that?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
 

#3 2010-06-21 20:17:33

bobbym
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Re: Find Sphere Volume

Hi;

If you say that the Volume ot the cube is equal to 100^3 then the sides of the cube are 100. The diameter of the sphere is equal to 100. The volume of the sphere is

V = ( 4 / 3 ) π r^3 = ( 4 / 3 ) π 50^3 = ( 4 / 3 ) *125000 π


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
 

#4 2010-06-22 15:16:23

lakeheadca
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Re: Find Sphere Volume

!!!Where did you learn this stuff!!!
you guys know almost everything in math.
  ********** thank you bobby***********
I have two questions which I asked couple of math teachers but couldn't get the answers (even reply:). I know you can solve those problems. I will write and try to ask you later, as soon as my computer work properly. I think they  involve Numerical Approximation and differentiation.

 

#5 2010-06-22 16:35:53

bobbym
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Re: Find Sphere Volume

Hi lakeheadca;

!!!Where did you learn this stuff!!!
you guys know almost everything in math.

I do look pretty good with wikipedia behind me.

I think they  involve Numerical Approximation and differentiation.

At last, my field! Now you will see me shine! A former boss of mine and one of the smartest people I ever knew said this about my work:

Watching you solve a problem hurts my eyes.

That's not so bad, that could mean anything.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
 

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