Help to solve a problem! From Moscow to Kiev 860 km. Kiev to Moscow was left by the fast train with a speed of 80 km of h. Along with it Moscow to Kiev was left by the passenger train with a speed of 70 km of h. At what distance from each other will they appear in three hours of a way?

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1) 70+80=150 km / - the speed of rapprochement of trains. 2) 150•3=450 km - on will be reduced initial distance between trains in 3 hours so many. 3) 860-450=410 km - distance between trains in 3 hours. between trains. Answer: 410 km.
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