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#1 2010-06-20 07:00:35

lakeheadca
Member
Registered: 2010-01-31
Posts: 37

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: 100³.
thank you

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#2 2010-06-20 07:21:23

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

Re: Find Sphere Volume

Hi;

spherecube_42278_lg.gif

Like that?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2010-06-20 22:17:33

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

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.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#4 2010-06-21 17:16:23

lakeheadca
Member
Registered: 2010-01-31
Posts: 37

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.

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#5 2010-06-21 18:35:53

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

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.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

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