Предмет: Математика, автор: AaaartBelkal

Сплав состоит из 3 частей меди и 4 частей олова и 5 частей цинка. Сколько граммов олова в 480 граммов сплава?

Ответы

Автор ответа: jany03
0
пропорция
480=3+4+5
х=4
х=(480*4)/(3+4+5)=1920/12=160
олов равен 160 грам

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