Final answer:
The question regarding the maximum range of cargo planes appears to have a typo since all listed planes have a range much greater than 18,000 feet, which is usually provided in nautical miles or kilometers. The actual ranges are thousands of nautical miles, significantly more than 18,000 feet.
Step-by-step explanation:
The question does not correctly specify the maximum range that you are asking about each cargo plane. It's important to note that the maximum range is typically much more than 18,000 feet; it is usually specified in nautical miles (nm) or kilometers (km).
The information provided about cargo planes and measurements might be a bit misleading in the context of the actual question, which is about the maximum range of different cargo aircraft. For example, the Boeing 747-8F has a range of around 4,120 nautical miles (7,630 kilometers), whereas the Antonov An-124 has a range of about 2,500 nautical miles (4,500 kilometers) when fully loaded.
The Airbus A350-900F and Lockheed Martin C-5 Galaxy both have comparable long ranges, but not as short as 18,000 feet. When you're looking for the range of these planes, you would have to refer to their specifications to compare effectively. None of these cargo planes have a range as short as 18,000 feet; this is likely a misunderstanding in the question's phrasing.