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50 lit. of hard water of 120 ppm temporary hardness is mixed with 1.62 kg of CaOH2, what is the hardness of the resulting water ? (The sp. gr. of hard water = 1 gm/ml)
(A) 8.088 × 105 ppm
(B) 8.088 × 104 ppm
(C) 80 ppm
(D) 808 ppm