Question

Nina can ride her bike 63,360 feet in 3,400 seconds, and Sophia can ride her bike 10 miles in 1 hour. What is Nina's rate in miles per hour if there are 5,280 feet in a mile?

Which girl bikes faster?

Answer 1

12.7 mi/h (Nina's rate), so Nina's bike is faster.

Explanation:

1 h = 60 min = 3600 sec

63360 ft/3400 sec *3600 sec/1 h * 1mi/5280ft =12.7 mi/h (Nina's rate)

12.9mi/h >10mi/h, so Nina is faster.