Math

Flying against the wind, a jet travels 2340 miles in 3 hours. Flying with the wind, the same jet travels 8960 miles in 7 hours. What is the rate of the jet in still air and what is the rate of the wind?

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  1. If the plane's speed is p
    and the wind's speed is w,
    then since distance = speed * time,
    3(p-w) = 2340
    7(p+w) = 8960
    Now just solve for p and w.

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    oobleck
  2. Vp - Vw = 2340/3 = 780 mi/h.
    Vp + Vw = 8960/7 = 1280 mi/h.

    Vp + Vw = 1280.
    Vp - Vw = 780
    Solve for Vw and Vp.

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