Each brick is 14 inches long, 8 inches wide, and 5 inches tall.if they used 16,800 in3 of concrete,

Each brick is 14 inches long, 8 inches wide, and 5 inches tall.if they used 16,800 in3 of concrete, how many bricks did they make?

Volume of a brick (V) is:
V = l * w * h

Plugging in our brick measurements, we get:
V = 14 * 8 * 5
V = 560

Calculate number of bricks:
Number of Bricks = Total Volume / Volume of one Brick
Number of Bricks = 16,800/560
Number of Bricks =30