For best quality cement the ratio between Silica and Alumina and the ratio of total other oxide is near as -

For best quality cement the ratio between Silica and Alumina and the r

1.	For best quality cement the ratio between Silica and Alumina and the ratio of total other oxide is near as -
Answer» 5.2 to 6 and 3 2.4 to 7 and 4 4.2 to 7 and 4 2.5 to 4 and 2 ANSWER :D