task5
# volume.py
def volume(length, width, height):
    return length * width * height

# surface_area.py
def surface_area(length, width, height):
    return 2 * (length * width + width * height + height * length)

# perimeter.py
def perimeter(length, width, height):
    return 4 * (length + width + height)
from volume import volume
from surface_area import surface_area
from perimeter import perimeter

l, w, h = 10, 20, 30

print(f"Volume = {volume(l, w, h)}")
print(f"Surface Area = {surface_area(l, w, h)}")
print(f"Perimeter = {perimeter(l, w, h)}")
