Suppose that crude oil from a supertanker has density 750 kg/m3. The tanker runs aground on a sandbar. To refloat the tanker, its oil cargo is pumped out into steel barrels, each of which has a mass of 15.0 kilogram when empty and holds 0.120 m3 of oil. You can ignore the volume occupied by the steel from which the barrel is made.
If a salvage worker accidentally drops a filled, sealed barrel overboard, it will float in the seawater. Find fraction of its volume will be above water surface?