Question

If 120 liters of milk solution contains 60% milk, how much milk should be added to make the solution 80% milk?

A 35 liters Correct Answer Incorrect Answer
B 42 liters Correct Answer Incorrect Answer
C 47 liters Correct Answer Incorrect Answer
D 40 liters Correct Answer Incorrect Answer

Solution

(120+x) ×20/100 = 40×80/100 (120+x) ×1/5 =32 120+x = 160 x = 40 liters

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