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7 January, 02:48

3) Two planes leave Atlanta at 3 pm EST. One flies east and travels at a speed of 75 kilometers per hour slower than the other plane with is flying west. By 7 pm EST, the planes are 5460 kilometers apart. What is the speed of the plane flying east? * A) 645 km/h B) 683 km/h C) 720 km/h D) 1440 km/h.

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Answers (2)
  1. 7 January, 03:11
    0
    East plane speed = x

    Flew for 4 hours = 4x

    West plane = (x+75)

    Flew for 4 hours = 4 (x+75) = 4x+300

    4x + 4x + 300 = 5460

    8x = 5160

    X = 5160 / 8 = 645

    East plane is flying at 645

    West plane is flying 645 + 75 = 720
  2. 7 January, 04:52
    0
    I could be wrong but i think its D) 1440
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Home » Mathematics » 3) Two planes leave Atlanta at 3 pm EST. One flies east and travels at a speed of 75 kilometers per hour slower than the other plane with is flying west. By 7 pm EST, the planes are 5460 kilometers apart.
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