Cubed shaped boxes like the figure shown are used for gifts. Find the surface area to figure out how much wrapping paper is needed to wrap one gift. One box needs in2 of wrapping paper

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.