Предмет: Геометрия, автор: Аноним

Площадь полной поверхности прямоугольного параллелепипеда равна 140 см квадратных,ширина 3см,длина 4см.Найдите высоту прямоугольного параллелепипеда

Ответы

Автор ответа: stason28042000

S=2(ab+bc+ac)
c - высота, пусть это будет "х"
Составим уравнение:
140=2(12+3x+4х)
140=24+14х
14х=116
х=58/7

Ответ: высота равна 58/7см

Автор ответа: Аноним

140см квадратных

Автор ответа: stason28042000

Все правильно. Площадь измеряется в см²

Автор ответа: Аноним

Ну да все верно,спасибо

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