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Maths Puzzle
Numerical Ability
How many liters of a 70% acid solution are needed to be mixed with 18 liters of a 10% acid solution to get a mixture which is 25% alcohol?
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Please help me with this problem
A rectangular hole 2 centimeters wide and x centimeters long is cut in a rectangular sheet of metal 5 centimeters wide and y centimeters long. The
4/x=3/x(squared)+ 5
Four over x equals three over x squared plus 5