Предмет: Математика, автор: minecraftcommunityan

Помогите. Буду очень благодарна, + 65 баллов)
669. Из Москвы и Ростова-на-Дону одновременно вышли навстречу друг другу два поезда. Поезд из Москвы шёл со скоростью 65 км/ч, а поезд из Ростова-на-Дону — со скоростью на 7 км/ч меньшей. На каком расстоянии друг от друга будут поезда через 6 ч после начала движения, если расстояние между Москвой и Ростовом-на-Дону 1230 км?
Можно пожалуйста только краткую запись (в виде чертежа)

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Ответы

Автор ответа: sergeevaolga5
0

65 км/ч                                                                        (65-7) км/ч

→                               |          ? км        |                        ←

|_______________|\\\\\\\\\\\\\\\\\\\\\\\|____________|

Мск       6 ч                                                     6 ч       Р-н-Д

Расстояние равно произведению скорости на время

1) 65-7=58 (км/ч) - скорость поезда идущего из Р-н-Д в Москву

2) 65+58=123 (км/ч) - сумма скоростей поездов

3) 123*6= 738 (км) - расстояние, которое  прошли оба поезда за 6 ч

4) 1230-738=492 (км) - расстояние между поездами через 6 ч

Ответ: 492 км


minecraftcommunityan: Ты мог бы чертеж сделать на листке и отправить фотографией.
Автор ответа: iramazurk
0

Пошаговое объяснение:

1) 65 - 7 = 58 (км/ч) - скорость 2 поезда

2) 65 + 58 = 123 (км/ч) - скорость сближения двух поездов

3) 123 * 6 = 738 (км) - приблизятся друг к другу два поезда за 6 часов

4) 1230 - 738 = 492 (км) - расстояние между поездами через 6 часов


minecraftcommunityan: Я просила чертеж..
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