JEE Advanced Model Paper 7 with solutions for online practice

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Passage-2

Initially 50 pounds of salt is dissolved in a large tank having 300 gallons of water. A brinesolution is pumped into the tank at a rate of 3 gal/min and well stirred solution is thenpumped out at the same rate. Given the concentration of the solution entering is 2 lb/ gal .Answer the following with this information.
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