Hi, thank you for posting your question here at Brainly.
To solve this problem, first you must form an equation. In this case,
Vpyramid = n*Vcube, which means the total volume of the pyramid is equal to the volume of the total number of cubes deposited by "n" students.
Vpyramid = 1/3*base*height = 1/3*12^2*17 = 816 ft3
Vcube = s^3 = 1 ft3
Hence, 816 = n(1), then n = 816 students.
Therefore, about 800 students are present in the school.