Fertilizer

Mr. Gherkin uses for fertilization 10% solution of fertilizer. 5 liters of it still left.

How much water must be added to the solution to make only the 7% solution?

Correct answer:

x =  2.1429 l

Step-by-step explanation:

r=10%=10010=101=0.1 q=7%=1007=0.07  r 5=q (5+x) 0.1 5=0.07 (5+x)  0.07x=0.15  x=0.070.15=2.14285714  x=7152.142857=2.1429 l



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