Answer:
175 cm^3
Explanation:
To solve this problem, one should know the density of iron in both liquid and solid states. Molten iron has a density of 7.0g/cm^3. while solid iron has a density of 8.0g/cm^3.
The mass of the iron won't change, therefore:
[tex]m_{solid}=m_{molten}\\d_{solid}*v_{solid}=d_{molten}*v_{molten}\\v_{solid}= \frac{7*200}{8} \\v_{solid}=175[/tex]
The volume when the iron cools and solidifies is 175 cm^3
