SOLUTION: A motorist covered a journey of 690 km in 8 hours. He covered part of the journey at 90 km/h and the rest at 80 km/h.What was the distance that he covered at 80 km/h?

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Question 1071245: A motorist covered a journey of 690 km in 8 hours. He covered part of the journey at 90 km/h and the rest at 80 km/h.What was the distance that he covered at 80 km/h?
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
                      SPEED       TIME         DISTANCE
First part             90           x            90x
Second part            80           y            80y
Totals                              8            690





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---------time in hours at 80 km/h

Distance done at 80 km/h ?
, in kilometers
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