1.) A container in the form of a rectangular parallelepiped having an altitude of 6m and a base of 10m by 8ft. is to be painted only on the outside surfaces. Compute for the number of cans of paint if a can covers an area of 12 sq. ft.
2.) How many gallons are needed to fill a pool 130ft long and 40 ft wide to a depth of 8ft. (231 cu in. = 1 gal.)
3.) A rectangular piece of cardboard 18 in. by 23 in. is made into a box with an open top by cutting a square of side 4 inches from each corner and folding up the sides. What is the volume of the box in cubic inches?