Mark constructs a cube of pure gold. The cube is 6 cm on each side. The density of gold is 19 grams per cubic centimeter. He buys the gold for $60 per gram. He sells it for 1.5 times its gold value. What was the profit?
Let's be accurate as possible. Think before you answer.
123120
The cube is 6 * 6 * 6 = 216 cubic cm.

So it has a mass of 216 * 19 = 4104 grams.

So it uses 60 * 4104 = $246240.

That means he sells it for 246240 * 1.

5 = $369360.

So he has a profit of 369360 - 246240 = $123,120.

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The answer: 123120