два поезда одновременно отправились от одной станции в противоположных

два поезда одновременно отправились от одной станции в противоположных направлениях.через 2ч расстояние между ними стало 280км.с какой среднейскоростью двигался каждый поезд,если у первого поезда она была на 20км больше,чем у второго без иксов
- Предмет:
  Математика
- Автор:
  kaseygmoi
- 5 лет назад

Ответы 1

1)280:2=140(км/ч)-суммарная скорость поездов.2)20:2=10(км/ч)3)140:2=70(км/ч)4)70+10=80(км/ч)-1 поезд.5)140-80=60(км/ч)-2 поезд.Ответ: 80 километров в час и 60 километров в час.
- Автор:
  winnie36
- 5 лет назад
- 0
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