SOLUTION: For a car moving at a constant speed the distance traveled varies directly with the time spent driving. If such a car travels 400 miles in 10 hours, how long does it take to travel

Question 1156891: For a car moving at a constant speed the distance traveled varies directly with the time spent driving. If such a car travels 400 miles in 10 hours, how long does it take to travel 280 miles? How many hours?
Answer by ikleyn(52795) (Show Source): You can put this solution on YOUR website!
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400 miles in 10 hours is the rate of  = 40 miles per hour.

At this rate, the car will cover 280 miles in   = 7 hours.    ANSWER



Alternatively, you can write a proportion

     = 

and find the unknown time  " t " from this proportion

    t =  = 7  hours.



Surely, you get the same answer.

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