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A tank contains 1oo gal of water in which initially 10 kg of salt are dissolved. Water containing cement 2kg/gal runs into the tank

A tank contains 1oo gal of water in which initially 10 kg of salt are dissolved. Water containing cement 2kg/gal runs into the tank at rate of 3 gal/min. The mixture, kept practically uniform runs out at the same rate, Solve for the amount of salt in the tank after 3 minutes.

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