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

Answer:

12.705 miles/hr; Nina is faster

Step-by-step explanation:

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

$63360ft*\frac{1mile}{5280 ft} =12 miles$

There are 3600 seconds in an hour therefore

$3400 s*\frac{1hr}{3600s} =0.944444444 hr$

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

$S=\frac{d}{t} =\frac{12}{0.944} =12.705$ miles/hr

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

Answer 2

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