v (m/s) velocity 10 30 (a) Walking velocity of Tom v (m/s) 20 velocity 10 t (sec) time 30 15 (a) Walking velocity of Susan t (sec) time The walking distance is velocity x time, if the velocity is constant.  If the velocity changes, the walking distance is the area under the time-velocity plot.  What is the walking distance of Tom and Susan?

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