He drove 150 miles in 25 hours What was his average speed in

He drove 150 miles in 2.5 hours. What was his average speed, in miles per hour?

Solution

Speed = distance / time
speed = 150 miles / 2.5 hours
speed = 60 miles / hour or 60 miles per hour
Always, use the units because if you are doing the wrong calculation, they will help you see that.