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A jet leaves an airport traveling at a steady rate of 600 km/h. Another jet leaves the same airport 3/4 hr later taveling at 800 km/$ in the same direction. How long will it take the second jet to overtake the first.

  • Math -

    RT = D (rate x time = distance)
    800 = rate of 2nd jet
    T = time of 2nd jet
    800T = distance of 2nd jet
    600 = rate of 1st jet
    T + .75 = time of 1st jet (3/4h = .75h)
    600(T + .75) = distance of 1st jet

    Distances are equal
    600(T + .75) = 800T

    Solve for T

  • Math -

    2 hours and 25 minutes

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