Final answer:
To convert 30 km to miles, multiply by the conversion factor of 0.62 miles/km.
Step-by-step explanation:
To convert kilometers to miles, we can use the conversion factor of 1 kilometer = 0.62 miles (or 5/8 km).
To find how far 30 km is in miles, we can multiply 30 km by the conversion factor.
30 km * 0.62 miles/km = 18.6 miles.