Answer:
96 mph
Explanation:
There are a couple of ways of doing this, but I will just use a proportion.
first off 1 hour = 60 minutes.
So 144/90 = x/60 will give me the answer per 60 minutes of miles per hour.
cross multiply to get 90x = 8640
divide by 90 to get 96 miles per 60 minutes or 96 mph.
Hope this helped.
