Question 1156891
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400 miles in 10 hours is the rate of {{{400/10}}} = 40 miles per hour.

At this rate, the car will cover 280 miles in  {{{280/40}}} = 7 hours.    <U>ANSWER</U>



Alternatively, you can write a proportion

    {{{400/10}}} = {{{280/t}}}

and find the unknown time  " t " from this proportion

    t = {{{(280*10)/400}}} = 7  hours.



Surely, you get the same answer.
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