Question

Which of the following conversion factors would be best used to convert 20 kilometers (km) to miles (mi)?

100cm /1m
0.62mi / 1km
1km / 0.62mi
5280 ft / 1mi

Convert 20 kilometers to miles. Round to the nearest tenth. (If necessary, round to two decimal places.)​

Answer 1

12.4 miles

Explanation:

It would be 1km / 0.62mi as this gives us a direct relationship between kilometers and miles. It's essentially telling us each kilometer is equal to 0.62 miles. Since we have 20 kilometers and we want to convert this to miles, we just multiply by 20 by 0.62 miles which gives us 12.4 miles