A tourist can bicycle 26 miles in the same time as he can walk 6 miles. If he can ride 10 mph faster than he can walk, how much time should he allow to walk a 25-mile trail? First, determine how fast he can walk. Let r represent the rate in mph at which the tourist can walk. Write an expression in terms of r that represents the time, in hours, it takes him to walk 6 miles. Write an expression in terms of r that represents the time, in hours, it takes him to bicycle 26 miles. Recall that he can bicycle 26 miles in the same time that he can walk 6 miles. Use this information to write an equation that can be used to solve for r. How fast (in mph) can he walk? mph How much time (in hour) should he allow to walk a 25-mile trail?