Final answer:
The error in flight altitude for colder temperatures than the International Standard Atmosphere is approximately 4 feet per thousand feet for each degree Celsius. None of the provided options match this value; hence, the question may be based on different assumptions.
Step-by-step explanation:
The amount of error in flight altitude when it is colder than the International Standard Atmosphere (ISA) is approximately 4 feet per thousand feet for each degree Celsius difference from ISA. This value can be derived from the standard lapse rate in the ISA, which is approximately 2 degrees Celsius per 1,000 feet. However, since the question provides options in the range of 50 to 500 feet and the correct value of 4 feet is not among them, this question might be incorrectly formulated or based on a different set of assumptions. In the context of the provided options, none of the answers (a) 50 ft, (b) 100 ft, (c) 200 ft, or (d) 500 ft are accurate when compared to standard lapse rates. To ensure safety and precision in aviation, pilots and aircraft systems use temperature corrections based on the ISA to adjust their altitude readings.