Answer: 5 miles
Step-by-step explanation: Assuming Truckers hikes at a constant rate, we can divide 3 hours by 3 to find how many miles he walks in 1 hour. Dividing 3 hours by 3 gives us 1 hour and dividing 15 miles by 3 gives us 5 miles.
Therefore, Tucker bikes 5 miles in 1 hour.