Предмет: Математика, автор: NaивNaя

Найдите периметр прямоугольника, если его площадь равна 420см2, а длина 15 см

Ответы

Автор ответа: Аноним

1) 420:15=28 см ширина
2) 2(28+15)=86 см периметр

Автор ответа: evgeniz1998

420:15=28 другая сторона а теперь 15+15+28+28=86

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