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the total drive is 450 miles, mila drives x mph for the first 200 miles, for the remaining distance she drives x + 30 mph
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the total drive is 450 miles, mila drives x mph for the first 200 miles, for the remaining distance she drives x + 30 mph

User Mike Mackintosh
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1 Answer

5 votes
First part of the trip:
Time taken= 200/x

Second part of the trip:
Time taken= 250/(×+30)

Average:
Time taken= 450/30
Time taken= 15 hours

200/x + 250/(×+3) = 15
-15x^2+405x+600=0
x=28.40805152
User Jon Musselwhite
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6.9k points
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