Answer:
Therefore,
Jana bikes 18 miles in one hour.
Explanation:
Given:
Jana bikes,
15 miles ---------------> in 50 minutes
To Find:
How many miles ------------------> in 1 hour = 60 minutes
Solution:
Let 'x' miles Jana Bikes in 1 hour or 60 minutes
As, 1 hour = 60 minutes
The Ratio of Equation will be

Cross Multiplying we get

Therefore,
Jana bikes 18 miles in one hour.