A solution contains 45 liters of ethanol and 8 liters of methanol P liters of ethanol and Q liters of methanol are added to the solution. If 30% of the new solution is 45 liters, and if methanol exceeds ethanol in the new mixture by 21 liters then find the value of P.
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10 litres of mixture are drawn off and filled with methanol. If the ethanol is now 15%, what is the capacity of the ..
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