Final answer:
The length of the Erie Trail is 360 miles, and the length of the eastern continental trail is 5400 miles.
Step-by-step explanation:
Let's assume that the length of the Erie Trail is x miles.
According to the given information, the eastern continental trail is 15 times longer than the Erie Trail. So, the length of the eastern continental trail is 15x miles.
The total length of both trails is 5760 miles. So, we can set up the equation:
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Therefore, the length of the Erie Trail is 360 miles, and the length of the eastern continental trail is 15(360) = 5400 miles.