Question

leah drives 45 miles per hour for 2 hours , then 32 miles per hour for 75 minutes . what is the average speed for the whole trip?

Answer 1

Find the average speed of Leah’s driving for her whole trip.
45 miles / hour for 2 hours
=> 45 miles x 2 hours = 90 miles for 2 hours
32 miles per hour for 75 minutes.
=> 75 minutes = 1 hour and 15 minutes or 1.25
=> 32 * 1.25 = 40 miles per 75 minutes

=> 90 miles + 40 miles = 130 miles
=> 2 hours + 1.25 hours = 3.25 hours
=> 130 miles / 3.25 hours
=> 130 / 3.25
=> 40 miles / hour = Leah’s speed