Предмет: Математика, автор: vikaviktoriyk1

из города одновременно выехали 2 поезда из скорость 60км/ч и 70км/ч через какое время между ними расстояние будет 156 км?

Ответы

Автор ответа: vmaluga2011

Если в одну сторону, то
70-60=10 (км/ч) скорость удаления
156:10=15,6 (ч)
Ответ: через 15,6 часа

Если в противоположные стороны, то
60+70=130 (км/ч) скорость удаления
156:130=1,2 (ч)
Ответ: через 1,2 часа

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