A copper bar with a volume of 43.5 cm has a mass of 387.15 g. What is the mass of 1 cm of copper?

By condition, it is known that 43.5 cm of copper corresponds to a mass equal to 387.15 g, therefore
43.5 cm = 387.15 g
To determine the mass of 1 centimeter of copper, it is necessary to divide both sides of the above equality by 43.5, therefore, we get
1 cm = 8.9 g
Answer: 1 cm of copper has a mass of 8.9 g.

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