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7 Jun 2020
In a petroleum refinery, a tank contains 2000 gal of gasoline that originally has 100 lb of an additive dissolved in it. In preparation for winter weather, gasoline containing 2 lb of additive per gallon is pumped into the tank at a rate of 40gal min. The well-mixed solution is pumped out at a rate of 45gal min. What proportion of the additive is within the tank 20 min after pumping process begins.
In a petroleum refinery, a tank contains 2000 gal of gasoline that originally has 100 lb of an additive dissolved in it. In preparation for winter weather, gasoline containing 2 lb of additive per gallon is pumped into the tank at a rate of 40gal min. The well-mixed solution is pumped out at a rate of 45gal min. What proportion of the additive is within the tank 20 min after pumping process begins.
24 Jul 2020
