Average Speed 2

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  1. A person walks 3 miles in 1 hour, then walks 4 miles in 2 hours. He stops for lunch for one hour to rest. Then he walks 3 miles in 1 more hour. What is his average speed for the journey?

    What is the equation for average speed?

    1.   Save = DT
    2.   Save = Dtotal(Ttotal)
    3.   Save = ΔD/ΔT
    4.   Save = Dtotal/Ttotal