Answer:
5083662.2 ft³
Explanation:
See picture for formula for V.
r = 46
h = 65
You can either convert the meters to ft beforehand:
65m * 3.2808 ft/m = 213.252 ft
46m * 3.2808 ft/m = 150.9168 ft
Or calculate in meters and multiply by 3.2808³ afterwards.