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 of mph if there are 5,280 feet in a mile

Answer 1

$\frac{63360ft}{3400s}* \frac{1mile}{5280ft}* \frac{3600s}{1hr} = 12.71mph$

Answer 2

nina's rate

mph
convert 3400 to hours
60mins per hour, 60 seconds per minute
60*60=3600 sseconds per hour

3400/3600=17/18

convert feet to miles
63360/5280=12
12 miles per (17/18) hours
12/(17/18)
multiply by 18/17
216/17=12.70588

about 12.7 miles per hour