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     EduGorilla 
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    If half of a distance is covered at a speed of 5 km/hr and the rest is covered at a speed of 15 km/hr, then what is the average speed?

    Options :-

    1. 10 km/hr
    2. 2.5 km/hr
    3. 7.5 km/hr
    4. 20 km/hr
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