Question 474579
<pre>
You just need to know the formula and substitute (15in) for r:

The formula is

{{{V=expr(4/3)pi*r^3}}}

Substitute (15in) for r:

{{{V=expr(4/3)pi*(15in)^3}}}

{{{V=expr(4/3)pi*3375in^3}}}

{{{V=4500pi}}} in³ 

As a decimal approximation

{{{V=14137.16694}}}in³

Edwin</pre>