Kevin can travel 22 1/2 miles in 1/3 hour. what is his average speed in miles per hour

D=vt  (distance equals velocity times time)

v=d/t  (velocity equals distance divided by time)  In this case:

v=(22 1/2mi)/(1/3hr)

v=(45mi/2)/(3/hr)

v=(45*3)/2 mph

v=67.5 mph

We can easily check our answer since d=vt so:

d=(67.5mi/hr)(hr/3)=22.5 miles, so it was correct.