Va rog ajutor dau coroana
![Va Rog Ajutor Dau Coroana class=](https://ro-static.z-dn.net/files/dd9/7bbd2889083a19b012c7abb839f1c38e.png)
5
p= mp/mt •100 =>mp= p•100/mt
mp= 90•100/2750= 3,27
m impura= 100℅-90℅=10℅