Предмет: Математика, автор: lalik

Большой экскаватор за смену выкапывает траншею длиной 1200 м ,копая по 210 м/ч. Маленький экскаватор работает с производительностью 70 м/ч. Траншею какой длины выкапывает маленький экскаватор за смену?

Ответы

Автор ответа: Fedor

0

Смена работы экскаватора 1200/210=40/7 часов

За это время маленький экскаватор выкопает 70*40/7=400метров траншеи

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