Distance between two years of 3400 km. 3/4 these distances the plane flew by in 3 hours. to orpedelit the speed of flight of the plane.

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1) 3400: 4 = 2) 850*3=2550 Answer's : speed is 2550 km 3400: 4 = 850 (km) one part of a way 850*3 = 2550 (km) three parts on a formula of finding of speed v=s: t of 2550:3=850 km/h
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