In what ratio, water must be added to dilute honey costing Rs. 280 per liter so that the resulting syrup would be worth Rs. 210 per liter?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 1 : 3
Water costs Rs. 0 and honey Rs. 280 per litre; the mixture is worth Rs. 210. By the rule of alligation:
\( \displaystyle \frac{\text{Water}}{\text{Honey}}=\frac{280-210}{210-0} \)
\( \displaystyle =\frac{70}{210}=\frac{1}{3} \)
So water and honey are mixed in the ratio 1 : 3.