Предмет: Математика, автор: Аноним

пириметр премоугольника 32см.Длина его относится к ширине как 5:3.Найжите площад прямоугольника ПРОШУУУУ ПОБЫСТРЕЕЕЕЙ(((((​

Ответы

Автор ответа: eldana0976
1

Ответ:

S=60

Пошаговое объяснение:

32:2=16

5*2=10

3*2=6

10*6=60

Автор ответа: gdjdhhd67
0

Ответ:

19.2

Пошаговое объяснение:


gdjdhhd67: Пусть х см - составляет одна часть. Тогда длина составит а=5*х см, а ширина b=3*х см.

Периметр прямоугольника равен: Р=2*(а+b)

32=2*(5х+3х)

32:2=8х

16=8х

х=16:8

х= 2 см

Тогда длина составляет 5*х=5*2=10=10 см.

Ширина 3*х=3*2=6 см

Площадь прямоугольника равна: S=a*b=6*10=60 cм²

Ответ: 60 см²
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