Question

A cubed-shape container has an edge length of 8 cm. The container is filled with decorative crystal cubes. Each cube has an edge length of 1 cm and costs 5¢. What is the total cost of the crystal cubes in the container? Enter your answer in the box.

Answer 1

The container is a cube with side length of 8 cm. If the crystals are also cubes with side length of 1 cm, then 8 crystals will fit along one side of the container. Since all the sides are the same length on a cube, we can take the  8 crystals and cube it to find the total amount of crystals in the container.

$8^3$ = 8·8·8 = 512

Each crystal costs 5 cents, so multiply 512 crystals by $0.05.

0.05(512) = $25.60