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27 March, 09:24

It takes Gretchen 275 seconds to travel 5500 m in her car. What is her rate of speed in kilometers per hour

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  1. 27 March, 11:56
    0
    72km/h

    Step-by-step explanation:

    Convert units to kilometers and hours.

    275 seconds : 60² ≈ 0.0764 hours

    5500 meters : 1000 = 5.5 km

    Convert to kilometers/hour.

    5.5km : 0.0764hrs = 72km/h
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