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22 September, 22:00

Paul travels from Rye to Eston at an average speed of 90km/h. He travels for T hours. Mary makes the same journey at an average speed of 70km/h. She travels for 1 hour long than Paul. Work out the value of T

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  1. 22 September, 23:44
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    Total distance covered;

    For Paul;

    sxt=distance

    90*t = d

    For mary;

    s*t=d

    70 * (t+1) = d

    70t+70=d

    Since they cover same distance;

    70t+70=90t

    Putting like terms together;

    70=90t-70t

    70=20t

    t=70/20

    t = 3 and 1/2 hours
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