Предмет: Математика, автор: Snazic

отношение длины комнаты к её ширине равно 5:4 найдите площадь комнаты если её длина 6 м найдите площадь комнаты если её длина больше ширины на 0,8 м

Ответы

Автор ответа: Hrisula
0

Отношение длины комнаты к её ширине равно 5:4

 а) Найдите площадь комнаты если её длина 6 м

 б) Найдите площадь комнаты если её длина больше ширины на 

на 0,8 м

––––––––––––––––––––––

а) 

Примем ширину равной х

Тогда 6/х=5/4

5х=24

х=4,8 м

Ѕ=6•4,8=28,8 м²

б) 

Примем ширину комнаты равной у.

Тогда длина равна у+0,8 

По условию (у+0,8):у=5/4

4•(у+0,8)=5у

4у+3,2=5у

у=3,2 м (ширина)

3,2+0,8=4 м (длина)

Ѕ=4•3,2=12,8 м²

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