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16 July, 20:03

Lance rides his bike downhill at a pace of 60 miles per hour. When Lance is riding uphill, he rides 8 miles per hour slower than on flat roads. If Lance's downhill speed is 4 times faster than his flat-road speed, how fast does he travel uphill? Let f represent Lance's pace on flat roads in miles per hour and u represent Lance's pace uphill in miles per hour.

Use tape diagrams to solve the problem.

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  1. 16 July, 22:20
    0
    7mph

    Step-by-step explanation:

    downhill=60mph

    f=60mph/4=15mph

    u=f-8mph=15mph-8mph=7mph
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