In what ratio should water be mixed with soda costing ₹ 12 per litre so as to make a profit of 50% by selling the diluted liquid at ₹ 15 per litre?

In what ratio should water be mixed with soda costing ₹ 12 per litre so as to make a profit of 50% by selling the diluted liquid at ₹ 15 per litre?

• A. 10:1
• B. 5:1
• C. 1:5
• D. 6:1

 

The correct answer is option C. 1:5. Can you explain this answer in the comments?

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