
    Calculate the available surface area for securing packages along the inner walls of a delivery truck's cylindrical cargo compartment, where packages can only be secured against the vertical surfaces and not the top or bottom circular faces. The cargo compartment has a radius of r meters and height of h meters, with the surface area calculation being critical for determining the maximum number of packages that can be safely secured during transport.
    

    
def lateralsuface_cylinder(r, h):
    """
    Calculate the available surface area for securing packages along the inner walls of a delivery truck's cylindrical cargo compartment, where packages can only be secured against the vertical surfaces and not the top or bottom circular faces. The cargo compartment has a radius of r meters and height of h meters, with the surface area calculation being critical for determining the maximum number of packages that can be safely secured during transport.
    

    """
def lateralsuface_cylinder(r, h):
    """
    Calculate the available surface area for securing packages along the inner walls of a delivery truck's cylindrical cargo compartment, where packages can only be secured against the vertical surfaces and not the top or bottom circular faces. The cargo compartment has a radius of r meters and height of h meters, with the surface area calculation being critical for determining the maximum number of packages that can be safely secured during transport.
    

    """
    lateralsurface = 2 * 3.1415 * r * h
    return lateralsurface