Question

An 80-pound bag of concrete mix will yield 0.6 cubic feet of concrete. Each bag costs $4.98. An artist wants to make a concrete sculpture consisting of three cubes, one on top of the other. The cube at the base will be 3 ft x 3 ft x 3 ft. The next cube will be 2 ft x 2 ft x 2 ft. The third cube will be 1 ft x 1 ft x 1 ft.
How much will the materials cost for the sculpture cost?

Answer 1

does anyone know the answer

Answer 2

For the first cube => Volume = (length) (width )(height)

Volume = (3) (3 )(3) = 27 cubic ft.

Number of 80-lb bags needed = (27/0.6) = 45

Cost of one bag is $4.98

So cost of 45 bags = 45 bags x $4.98/bag = $224.1

For the second cube =>

Volume = (2) (2)(2) = 8 cubic ft.

Number of 80-lb bags needed = (8/0.6) = 13.333=13

Cost of one bag is $4.98

So cost of 13 bags = 13 bags x $4.98/bag = $64.74

For the third cube =>

Volume = (1) (1 )(1) = 1 cubic ft.

Number of 80-lb bags needed = (1/0.6) = 1.66=2

Cost of one bag is $4.98

So cost of 2 bags = 2 bags x $4.98/bag = $ 9.96

Material costs = 224.1 + 64.74 + 9.96

Materials cost for the sculpture = $298.8