Final answer:
To determine which is longer, we need another measurement to compare it with.
Step-by-step explanation:
In this question, it seems that there is some confusion in the wording. However, if we assume that the question is asking about a comparison of lengths, we can help. To determine which is longer, we need another measurement to compare it with. For example, if we are comparing 900 miles with a shorter distance like 800 miles, then 900 miles is indeed longer.