Question

A company makes concrete bricks shaped like rectangular prisms. Each brick is 14 inches long, 8 inches wide, and 5 inches tall. If they used 16,800in3 of concrete, how many bricks did they make?

Answer 1

14x8x5=560

16800 divided by 560=30

30 bricks

Answer 2

We'll first need to find the area of one brick. We'll do this by doing length × width × height.

14 × 8 × 5

= 560

So one brick is 560in³.

Now, to find how many bricks there are, we'll divide the total area of concrete (16,800in³) by the area of one brick (560in³)

16,800 ÷ 560

=

30

There are 30 bricks that the company made.