Make up your problem with appropriate word and number

who went farther, you who (pick and activity) at a rate of
miles per hour for minutes or your friend who (pick an activity) at a rate of miles per hour for minutes?
!

You run in a race at a rate of 4 miles per hour  for 60 minutes and your friend runs in the race at a rate of 3.5 miles per hour for 60 minutes.
Your friend starts running 10 minutes before you, and you run for a half hour

Friend: 40/60 × 3.5 = 2 1/3  miles
You:  30/60 × 4 = 2 miles 

You won't catch up in a half hour
4 mph: = 4×5280      
                     =352 ft/min; y = 352x 
                      60

3.5 mph: = 3.5×5280   
                      = 308 ft/min; y = 308(x+10)
                       60
( this is a fraction bar. lol)

You take about 70 min for you to catch your friend 

Letter b hope it