Hema was making a model, in which she placed 4 cubes each of edge 20 cm one above the other. Find the surface area of the resulting cuboid.

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?