Task id16341

An airplane flies from point A at a speed v1 = 500 km/h relative to the air to point B, located north of point A at a distance L = 1000 km. All the way the north-west wind blows at a speed v2 = 100 km/h. How long after departure will the plane arrive at its destination if it flies in a straight line? At what point should the pilot fly the plane?