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Asked by arindeep.singh | 17 Sep, 2020, 11:19: AM
answered-by-expert Expert Answer
If x is the amount of 18% solution, then there must be 5-x liters of 40% solution, since the total volume is 5 liters. 

Now, we have:

.18x + .40(5-x) = .312(5) 
.18x + 2 - .4x = 1.56 
.22x = .44 
x = 2 

so, 2L of 18% and 3L of 40% will produce 5L of 31.2%
Answered by Renu Varma | 17 Sep, 2020, 01:15: PM

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