The number of miles an average person can bike in 30 minutes can vary depending on various factors, including the individual's fitness level, terrain, biking experience, and speed. However, as a rough estimate, a moderately fit individual biking at a moderate pace of around 12-14 miles per hour could cover approximately 6-7 miles in 30 minutes.
It's important to note that this estimate is just a general guideline, and individual results may vary. Factors like fitness, terrain, wind resistance, and bike type can all affect the distance covered in a given time. Additionally, some people may be able to bike at faster speeds and cover more distance, while others may prefer a slower pace. It's always best to consider your own fitness level and abilities when estimating how far you can bike in a specific timeframe.