How do you get the answer for An airplane flies 22 feet in 2 seconds what is the airplane's speed in miles per hour?

Answer 1

To find out what 22 ft in 2 seconds is in miles per hour we have to use conversion factors and simplification.

22 ft per 2 seconds can be rewritten like this 22 ft / 2 s this simplified equals 11 ft / 1 s

Now we use conversion factors:

To convert feet to miles we have to use multiplication (there are 5280 feet in one mile), the conversion factor is 1 mi / 5280 ft, the goal is to cancel out feet and replace them with mile.

(11 ft / 1 s) x (1 mi / 5280 ft) = 11 mi / 5280 s = 1 mi / 480 s

Now that feet are converted to miles we need to convert seconds into hours (there are 3,600 s in one hour), the conversion factor is 3600 s / 1 hour. The goal is to cancel out seconds and replace them with hour.

(1 mi / 480 s) x (3600 s / 1 hour) = 3600 mi / 480 hours

Simplify 3600 mi / 480 hr

And the answer is:

7.5 mi / hr = 7.5 miles per hour