Question 353878
Hi,
*Note: {{{S=4*pi*r^2}}}
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{{{V= (4/3)*pi*r^3 = (1/3)*(4/1)*pi*r^3 =(1/3)r*4*pi*r^2}}} 
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{{{V=(1/3)r*4*pi*r^2}}}
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Insert S for {{{4*pi*r^2}}}
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{{{V= (1/3)r*S}}}