Lag1989 task №1.3

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Two aircraft simultaneously emitted from one point on the board, constituting α = 60°; a speed of 600 km / h, the other at a speed of 900 km / h. both increases over time the distance between the planes? What is the distance at the moment when the first plane flown by way of 950 km? Find the speed at which the aircraft is removed from each other.
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