With the wind, an airplane travels 1120 km in seven hours. Against the wind, it takes eight hours. Find the rate of the plane in still air and the velocity of the wind.
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V0 + W = 1120 / 7 = 160
V0 - W = 1120 / 8 = 140
2 V0 = 300 adding equations V0 = 150 km/hr
150 + W = 160
W = 10 km/hr
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