Question

Bricklayers use the formula N = 7LH to estimate the number of bricks N needed to build a wall of height H and length L. What is the height of a wall that is 30 feet long and that requires 2,310 bricks to build?

Answer 1

N = 7LH; where N = 2,310, L = 30
2310 = 7(30)H = 210H
H = 2310/210 = 11

The height of the wall is 11 feet.