22 A container is made out of thin material in the shape of a cuboid with an open top. The container has length 15 cm and width 8 cm. The volume of the container is 720 cm3. (a) Calculate the height, h cm, of the container. (b) Calculate the surface area of the outside of the container. (c) Liquid is poured into the container. The liquid fills 60% of the container. Calculate the height of the liquid in the container.