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

Nina's rate is 12.7 mph and Sophia's rate is 10 mph. Therefore, Nina is faster.

Answer 2

12.705 miles/hr; Nina is faster

Explanation:

If there are 5,280 feet in a mile then:

`63360ft*(1mile)/(5280 ft) =12 miles`

There are 3600 seconds in an hour therefore

`3400 s*(1hr)/(3600s) =0.944444444 hr`

if we divide distance and time we have nina's rate

`S=(d)/(t) =(12)/(0.944) =12.705` miles/hr

Nina's rate is bigger than sophia's 10 miles/hour rate