Предмет: Математика, автор: romanovnamarta2010

площади двух прямоугольников равны Длина одного из прямоугольника равна 20 см а ширина на 6 см меньше. Какова длина другого прямоугольника если его ширина равна 10 см?

Ответы

Автор ответа: slavutaanastasia17

1

Ответ:

x=8

Пошаговое объяснение:

Ширина 1 прямоугольника равна 10-6=4

Состовим пропорцию 4*20=8*х; 80=8х; 8=х.

Автор ответа: irina555556

0

S1=S2

S1=20cм×(20 см-6см)=280см²

S2=280см²=10см×а

10см×а=280см²

а=28см

Ответ: длина другого прямоугольника равна 28 см.

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