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Volume of a sphere 
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#1
Jun2313, 03:19 PM

P: 342

1. The problem statement, all variables and given/known data
Show that the volume of a sphere of radius r is V = (4/3)πr^2 2. Relevant equations calculus, integration 3. The attempt at a solution I have the solution in the book but it's confusing me, I'll attach a picture. So I get lost where it starts talking about a crosssectional area all of a sudden multiplying by ∏. What's going on here?! 


#2
Jun2313, 03:29 PM

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P: 15,201

What's the area of a circle of radius r? What if the radius is y instead of r?



#3
Jun2413, 12:50 AM

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P: 21,397




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