A car drives 70 miles in 2 hours. How far will it have traveled in 3 hours? Explain how you would solve this problem using a proportion.

Question

A car drives 70 miles in 2 hours. How far will it have traveled in 3 hours? Explain how you would solve this problem using a proportion.

Answer 1

70 miles   x miles 

———— = ————

2 hours      1 hour 

          x  = 35 miles per hour

       

3 hours * 35 miles per hour = 105 miles 

 

or 

 

70 miles    x miles

———— = ————

2 hours      3 hours

   (70 x 3) = 2x

         210 = 2x

 105 miles = x