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7It is given that 10 mL of fuel stabilizer treats 3 L of gasoline. Fuel stabilizer is added, in the specified concentration, to 30 liters of gasoline inside a tank to preserve it during storage. After some time has passed, 10 liters of gas is used up, and a fresh 10 liters of gas is pumped into the tank to replace it, but no additional stabilizer is added. After some additional time has passed, 15 liters of gas is used up and a fresh 15 liters of gas is pumped into the tank to replace it. How much stabilizer must now be added to the fuel inside the tank to maintain the correct concentration of stabilizer? Where appropriate, ignore the small volume contribution of the stabilizer in the calculations.

7It is given that 10 mL of fuel stabilizer treats 3 L of gasoline. Fuel stabilizer is added, in the specified concentration, to 30 liters of gasoline inside a tank to preserve it during storage. After some time has passed, 10 liters of gas is used up, and a fresh 10 liters of gas is pumped into the tank to replace it, but no additional stabilizer is added. After some additional time has passed, 15 liters of gas is used up and a fresh 15 liters of gas is pumped into the tank to replace it. How much stabilizer must now be added to the fuel inside the tank to maintain the correct concentration of stabilizer? Where appropriate, ignore the small volume contribution of the stabilizer in the calculations.

Grade:12

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