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In what ratio should 20% ethanol solution be mixed with 40% ethanol solution to obtain a 28% ethanol solution?
- A2 ∶ 3
- B8 ∶ 5
- C3 ∶ 2
- D5 ∶ 8
Answer not set
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CCommunity
Let the ratio of 20% ethanol to 40% ethanol be x ? 1,
According to the question,
⇒ x × 0.2 + 1 × 0.4 = (x + 1) × 0.28
⇒ 0.08x = 0.12
⇒ x = 3/2
∴ Required Ratio = 3 ? 2
According to the question,
⇒ x × 0.2 + 1 × 0.4 = (x + 1) × 0.28
⇒ 0.08x = 0.12
⇒ x = 3/2
∴ Required Ratio = 3 ? 2