alleryA 3/4 L mix is 2/5 syrup by volume; how much water makes it 1/4 syrup?
A3/20 L
B3/10 L
C9/20 L
D6/5 L
Answer & Solution
Correct answer: C. 9/20 L
The syrup volume is 3/4 × 2/5 = 3/10 L, so the required total is (3/10) ÷ (1/4) = 6/5 L and the water added is 6/5 − 3/4 = 9/20 L.
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