How do you figure out If 400 bricks measuring 81" by 31" are required to build a wall 42 ft. high, how long is the wall?

Question

If 400 bricks measuring 81" by 31" are required to build a wall 42 ft. high, how long is the wall?

Answer 1

Each brick is 81"x31" (or 6.75'x2.58'). Probably a

"brick" cut of quarried stone as was used on many

historic federal buildings and monuments.

6.75x2.58=17.44 ft²........area one brick, square feet
400x17.44=6975 ft²........total area of 400 bricks, square feet
6975÷42=166.07 ft..........total brick area divided by 42' height of wall

The length of the wall is approximately 166 linear feet.