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math

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Jake and Sara each drive 270 miles to attend a conference. Jake drives at an average
speed that is 15 mi/h slower than Sara’s average speed. It takes Jake 1.5 hours longer
than Sara to drive the 270 miles. How long does it Jake to make the trip?

  • math - ,

    since time = distance/speed, If Jake's speed is x,

    270/x = 270/(x+15) + 1.5
    x = 45

    So, it takes Jake 270/45 = 6 hours

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