Предмет: Математика, автор: валя20061

из двуз городов, расстояние между которыми равно 900 км вышли одновременно навстречу друг другу два поезда. скорость одного 70 км/час, скорость другого 80 км/час. Через сколько часов поезда встретятся? пожалуйста без иксов.

Ответы

Автор ответа: daravolcenkova3
0

1) 70 + 80 = 150 ( км/ч) - скорость движения

20 900: 150 = 6 ( ч) - через такое время они встретятся

Ответ: через 6 часов

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