Предмет: Математика, автор: Аноним

Составте выражение  для решение задачи: Чтобы попасть на место  назначения  геологам пришлось проехать а ч на поезде , который шел со скоростью 60км/ч, а потом проехать bч на автомашине со скоростью 30 км/ч. Обратный путь  был на 150 км короче, т.к возвратились они на вертолете, скорость которого 300 км/ч.сколько времени геологи затратили на обратный путь???

Ответы

Автор ответа: anmih
0

60*а расстояние на поезде

в*30 расстояние на авто

60а+30в расстояние к месту назначения

(60а+30в)-150 длина  обратного пути

((60*а+30*в)-150):300 время, которое затратили на обратный путь геологи

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