Question 855324
"How many stones will it take to build a wall that is 39 inches by 396 inches, if the stones are 6.5 inches by 16.5 inches?"
How much surface area in a 39 by 396 space? 15444
How much surface area is covered by a 6.5 * 16.5 stone? 107.25
.
Divide the total area by the individual stones.
15444 / 107.25 = 144 stones