3.5 * 60 = 210 miles
450 - 210 = 240 miles to go
240 / 4 = 60 mph
You and a friend take turns driving on a 450 mile trip. Your friend drives for 3.5 hours at an average speed of 60 miles per hours. What must your average speed be for the remainder of the trip if you want to reach your hotel in 4 more hours?
1 answer