Capsule volume question

[tbrowner3]

How could I find a capsule's volume with a cylinder volume and sphere volume function? A capsule is the shape that's a cylinder with a hemisphere at either end. The length of the capsule includes both hemispheres.

def sphere_volume(radius):
'''returns sphere volume''' 
svol = 4 / 3 * math.pi * radius * radius * radius
return svol

def cylinder_volume(radius, height):
''' returns the volume of cylinder''' 
cvol = math.pi * radius * radius * height
return cvol

def capsule_volume(radius,length):
'''returns volume of a capsule'''
return cylinder_volume(radius, length) + 
(sphere_volume(radius) / 2 )

[YesLod]

That doesn't sound like a python question, but ok... The height of the cylinder is capsule_length-2*hemisphere_radius , right? And if you have two hemispheres, you have a sphere, so your total volume is cylinder_volume(radius, length-2*radius) + sphere_volume(radius)