Write a class Cuboid. The constructor new Cuboid(length, width, height) stores the sizes in the fields length, width and height. The getter volume returns the volume, the getter surfaceArea returns the total surface area.
Then write a class Cube that extends Cuboid. Its constructor takes only the edge length.
new Cuboid(1, 2, 3).volumeReturns 6
new Cuboid(1, 2, 3).surfaceAreaReturns 22
new Cube(2).volumeReturns 8
Hidden tests run on Submit.