SOLUTION: Xavier drove 100 miles at a rate of 60 miles per hour and then he drove another 100 miles at a rate of 40 miles per hour. How long was he driving? What was his average speed?

Question 1084569: Xavier drove 100 miles at a rate of 60 miles per hour and then he drove another 100 miles at a rate of 40 miles per hour. How long was he driving? What was his average speed?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Xavier drove 100 miles at a rate of 60 miles per hour and then he drove another 100 miles at a rate of 40 miles per hour. How long was he driving? What was his average speed?
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d = r*t
t = d/r
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Total time = 100/60 + 100/40 = 25/6 hours or 4 hrs 10 minutes.
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To find mi/hr, divide the miles by the hours.

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