Tim and rick both can run at a constant speed vr and walk, Ask an Expert

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Q. Tim and Rick both can run at a constant speed Vr and walk at the constant speed Vw, (Vw < Vr).? They set off together on a journey of distance D. Rick walks half of the distance and runs the second half. Tim walks half of the time and runs the other half.

(1) Draw a graph showing the positions of both Tim and Rick versus time.

(2) Explain who wins and why

(3) How long does it take Rick to cover the distance D?

(4) Calculate Rick's average speed for covering the distance D

(5) How long does it take Tim to cover the distance?

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