You find the volume of the right rectangular prism using the formula method and want to check your answer using the cube method. What is the edge length of the cubes you will use? Lengths are given in inches. Provide your answer as a fraction reduced to the lowest terms.

Question

1 1/3
1
2/3

Answer 1

The edge length of the cubes will be 1/3 of an inch.

This is because in order to use the cube method to check the volume of a rectangular prism, you create smaller cubes that completely fill the rectangular prism. Therefore, the edge length of the cubes should divide each of the dimensions of the rectangular prism evenly.

Since 1 inch = 3/3 inches, the edge length of the cubes should be 1/3 inches.