Problema Solution
One lap around a track is equal to one-eighth of a mile. A horse ran a distance of 9 laps in 2 minutes
and 30 seconds. What was the horse’s average speed in miles per minute?
Answer provided by our tutors
The distance that the horse ran is:
d = (1/8)*9
d = 9/8 mi
The running time of the horse is:
t = 3 min 30 sec
t = 3.5 min (since 30 sec is half a minute)
The average speed equals the distance divided by the time:
v = d/t
v = (9/8)/3.5
v = 0.32 mi per min
The horse’s average speed is 0.32 miles per minute.