Предмет: Математика, автор: kislac

Пол комнаты, имеющий форму прямоугольника со сторонами 7 м и 8 м, требуется покрыть паркетом из прямоугольных дощечек со сторонами 10 см и 40 см. Сколько потребуется таких дощечек?

Ответы

Автор ответа: ToLse

найдем площадь пола . 7м=700 см, 8м=800см
S= 700*800=560000 см^2
тепер площадь 1 доски 10*40=400
теперь находим 560 000/400=1400

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