SOLUTION: A man drives a car a distance of 200 km at an average speed of 44 km/h. What must be his average speed for the next 220 km if he is to cover the total distance in 9 hours?

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Question 736247: A man drives a car a distance of 200 km at an average speed of 44 km/h. What must be his average speed for the next 220 km if he is to cover the total distance in 9 hours?
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
A man drives a car a distance of 200 km at an average speed of 44 km/h. What must be his average speed for the next 220 km if he is to cover the total distance in 9 hours?
He wants to have gone the entire 420 miles in 9 hours. 

He has driven 200 km at 44 km/h.

Since , he has spent  or  or  hours.

So he has 220 miles to go, and he has 9- or  or  hours left. So since ,

                   = × =  or  km/hr.

                  He must go  km/hr.

Edwin
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