Mathematics, 22.07.2019 05:20 gugu1004

Plz solve i beg u an airplane flies to san francisco from los angeles in 4 hours. it flies back in 3 hours. if the wind is blowing from the north at a velocity of 20 mph during both flights, what was the airspeed of the plane (its speed in still air)?

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Plz solve i beg u an airplane flies to san francisco from los angeles in 4 hours. it flies back in 3...