When multiplying conversion factors, make sure the only remaining units are the desired units.
D
Practice makes perfect
We are asked to determine which of the given rates is the same as 35 miles per hour. To do this, let's convert miles per hours into feet per minute.
35 mi/1 h=ft/1 min
Let's start by organizing the relationships between the units in a table.
Starting Unit
Converted Unit
Unit Ratio
1 mile
5280 feet
5280ft/1mi
1 hour
60 minutes
60min/1h
To perform this conversion, we need to multiply the given value by each unit ratio or its reciprocal. Remember, we want to arrange these ratios in a way that the units we do not want get canceled out and only the units that we do want remain.
We got that the 35 miles per hour is the same rate as 3080 feet per minute. This means that the correct option is D
Extra
Common Conversion Factors
Use the following tool to explore some of the most commonly used conversion factors. Conversions can be made both within or between the metric system and the imperial system, also known as the U.S. Customary System.
Around the world, people use conversion factors on a regular basis. You can read more about some practical applications of conversion factors in our original content.
