Quote:
Originally Posted by crimper
Buoyant Force Formula
Fb=gρV=ρghA
Where ρ is the density of the fluid (saltwater=1029 kg/m3)
g is the gravity,
V is volume of the immersed part of the body in the fluid.
h is the height of immersed part and
A is the area.
Solve for Fb (Buoyant Force) first
Fb=ρghA
Then Solve for V (Volume of the immersed objects e.g. sand+rocks)
V1=[Fb/ρg]
Vt=V1+V2
Where Vt= Total Volume = 300 Gallons = 1135.62 Liters
V1=Total Volume of Objects (Sand+Rocks)
V2= Total Volume of Water
V2=VtV1
Good Luck

Great if you're floating a barge and want to figure out the volume it displaces. Let us know how the figuring volume of rock works out
To simplify, I'll guess the rock takes 50g of space. There ya go!