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In this lesson, we will learn how to find the density of a 3-dimensional object and how to solve word problems on density.
A submarine has a volume of
cubic feet. Its density must
than or equal to 62.43 pounds per cubic foot to float on the surface of the water. What is the greatest
possible mass that the submarine could have before sinking?
A large balloon has a volume of
1.767 cubic feet.
It is filled with helium, which has a
density of 0.010238 pounds per cubic foot.
What is the mass, in pounds
and correct to three
decimal places, of the helium in the balloon?
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