1.

One cubic metre of bone can treat how much quantity of water containing 3.5 ppm of fluoride?$

A. 10m<sup>3</sup>
B. 100m<sup>3</sup>
C. 1000m<sup>3</sup>
D. 10000m<sup>3</sup>
Answer» C. 1000m<sup>3</sup>


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