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A nuclear physicist needs 30 liters of a 40% acid solution. Currently has 30% solution and 60% solution. How many liters of each does he need for a 40% solution

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1 Answer

Need two equations to solve this one.
Let x represent the liters 30% solution and y the liters 60% solution.
For liters of solution equation [ x+y=30 ]
For concentrations equation  [0.3x+0.6y=0.4(30)]
Solve for the x and y using the two equations with two unknowns (just like a system of equations problem)
See if you can solve for and calculate the answer with this information.
Let me know if this helps.