function volume_prolate_spheroid ($polar_radius$equatorial_radius
{
$volume = (4/3) * pi() * ($equatorial_radius * $equatorial_radius) * $polar_radius
return $volume
}
function volume_prolate_spheroid ($polar_radius$equatorial_radius
{
$volume = (4/3) * pi() * ($equatorial_radius * $equatorial_radius) * $polar_radius
return $volume
}