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NITIN asked this question on School Talk

 Partially dried clay mineral contains 8% water.The original sample contained 12% water and 45% silica.The % of silica in partially dried sample is nearly ___?

Ans:-47%.

Why do we take ration of silica and clay to solve this problem?Why can't we take ratio of silica and water?If we do so the answer is 30% but correct answer is 47%.

Please tell me.

Asked by NITIN(student), on 27/8/10
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