Find the volume $ V $ of a sphere if radius $r = 6.4$ and diameter $d = 12.8$.
Answer
$V = 54.6133\pi$
Explanation
To find volume $ V $ use formula:
$$ V = \dfrac{ 4 \cdot r^2 \cdot \pi}{ 3 } $$After substituting $ r = 6.4 $ we have:
$$ V = \dfrac{ 4 \cdot 6.4^2 \cdot \pi}{ 3 } $$ $$ V = \dfrac{ 4 \cdot 40.96 \cdot \pi}{ 3 }$$ $$ V = \dfrac{ 163.84 \cdot \pi}{ 3 }$$ $$ V = 54.6133 \cdot \pi $$This page was created using
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