Предмет: Математика, автор: yiv2111

От двух пристаней, расстояние между которыми 120 км, одновременно навстречу друг другу отчалили два катера. Скорость первого катера 18 км/ч, а второго 22 км/ч . Через сколько часов они встретятся? Составь и реши обратные задачи

Ответы

Автор ответа: Настюшка21G

18+22=40 км в час скорость сближения.
120:40=3 ч
Ответ: через 3 часа они встретятся.
Из двух пристаней,одновременно навстречу друг другу отчалили два катера.Скорость первого катера 18 км/ч, а второго 22 км/ч Они встретилисбь через 3 часа. Какое расстояние между пристаней?
(18+22)*3=120 км
Ответ: 120 км

yiv2111: большое спасибо,Настюшка21G

Настюшка21G

Настюшка21G: Пожалуйста:)

yiv2111: :3

Автор ответа: sokiva

1).18+22=40(км/ч)—скорость сближения двух катеров
2).120:40=3(ч)—через столько они встретятся
Ответ: катера встретятся через 3 часа.

Расстояние — 120 км
Время — 3 ч
Скорость первого — 18км/ч
Скорость второго —?
1) 120:3=40(км/ч)—скорость сближения
2).40-18=22(км/ч)—скорость второго
Ответ: скорость второго катера 22 км/ч

Скорость первого —18км/ч
Скорость второго —22км/ч
Время — 3ч
Расстояние —?
1).18+22=40(км/ч)—скорость сближения
2).40·3=120(км)—расстояние между пристанями
Ответ: расстояние между пристанями 120 км

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