Предмет: Математика, автор: УмНиЧкА3165

реши задачу:ДВА ПОЕЗДА ИДУТ НАВСТРЕЧУ ДРУГ ДРУГУ СО СКОРОСТЬЮ 45КМ/Ч.ДЛИНА КАЖДОГО ПОЕЗДА 250М.СКОЛЬКО СЕКУНД ПРОЙДЕТ С МОМЕНТА ВСТРЕЧИ МАШИНИСТОВ ДО МОМЕНТА ВСТРЕЧИ ПРОВОДНИКОВ СТОЯЩИХ У ПОСЛЕДНИХ ДВЕРЕЙ ПОСЛЕДНИХ ВАГОНОВ

Ответы

Автор ответа: ФАИНА1984
0

1)45+45=90км/ч(25м/сек)-скорость сближения.

2)250+250=500м-длина поездов.

3)500:25=20 сек.

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