Raw Materials#!#Food In The Earliest Cities

The raw material used for preparing permutit is

The raw materials of the Solvay precess are

The most important raw materials used in the manufacture of cement are

Photosynthesis requires chlorophyll, and a few other raw materials. Add the missing raw materials to the list given below : Water, minerals. (a)____, (b)____.

The price of raw materials has gone up by 15% , labour cost has also increased from 25% of the cost of raw material to 30% of the cost of raw material. By how much percentage should there be reduction in the usage of raw materials so as to keep the cost same