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21 March, 07:34

On a drive from one city to? another, victor averaged 39 mph. if he had been able to average 72? mph, he would have reached his destination 11 hrs earlier. what is the driving distance between one city and the? other?

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  1. 21 March, 08:46
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    Let the unknown distance be xmiles

    x/39-x/72=11hr

    72x-39x/2808=11hr

    33x/2808=11

    33x = 30888

    x=936miles

    U can substitue back to check

    at speed of 72mph, he would need 936/72=13hrs

    at speed of 39mph, he would need 936/39=24hr

    the difference is 24-13=11
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