Question

Marie is riding her bike at 15 miles per hour. What is her rate of speed in feet per second?

5.9
1.5
88
22

Answer 1

22

Explanation:

We know that 1 miles = 5280 ft and 1 hour = 3600 seconds

15 miles 5280 ft 1 hour

--------------- * ------------- * -------------- =

1 hour 1 mile 3600 second

The units cancel leaving us ft/s

22 ft/s