import math 
pi= math.pi

def cyl_volume (h,r):
	volume = math.pi * (r**2) * h 
	return volume

print(cyl_volume(1,1))

def cone_volume(h,r):
	volume = (h/3) * math.pi * (r**2)
	return volume

print(cone_volume(1,1))
print(f"1/3 pi = {math.pi/3}")
