Question 753903
Volume of a square based pyramid =
1/3 * Area of base * height
If one side of base = 5ft
then area of base = 25  (5 * 5) ft^2

Vol = 1/3 * area of base * height
250 = 1/3 * 25 * height
Height = 250/ 1/3 * 25
Height = 30ft

Hope this helps
:-)