Answer:
h = 21.6 m
Explanation:
*I'm assuming that you need the height. If not, let me know and I'll edit my answer...
The formula for volume of a pyramid is
V = (1/3)Bh where B is the area of the base, and h is the height
We are given V = 8820, and the base is a square with area of 35² = 1225, plug those in and find the height...
8820 = (1/3)(1225)h
26460 = 1225h (multiply both sides by 3 to get rid of the fraction)
26460/1225 = h (divide both sides by 1225 to isolate h)
21.6 = h