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For the manufacture of Portland cement, the proportions of raw materials used, are:

ALime 63% ; silica 22% ;other ingredients 15%

BLime 22%; silica 63%;other ingredients 15%

CSilica 40%; lime 40%;other ingredients 20%

DSilica 70% ; lime 20% ;other ingredients 10%

Answer:

A. Lime 63% ; silica 22% ;other ingredients 15%


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