i would think that the depression would be from the boat as its about to off a cliff but more at a 45 to 80 degree angel as it falls of the cliff
Let's assume length of the room as y
so the width of the room = y - 5
Area
y * (y - 5) = 750
Answer:
The volume of the cylinder would probably me 54? dont quote me I am not 100 percent sure, but if you need any help feel free to message me!