Предмет: Математика, автор: nastua9191

Дачник, пройдя первый час со скоростью 3,5 км/ч, рассчитал, что двигаясь с такой скоростью, он опоздает на 1 час. Оставшийся путь он прошёл со скорость 5 км/ч и пришел на станцию за 30 мин до отхода поезда. Определите, какой путь должен пройти дачник?

Ответы

Автор ответа: dvg2000

х км должен пройти, тогда

(х/3,5) - 1 = (х/5)+0,5

х/3,5 - х/5 = 1+0,5

1,5х/17,5 = 1,5

х = 17,5 км должен пройти дачник

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