2025 · Q10
A mixture of 100 L contains kerosene and turpentine oil in the ratio 3 : 2. What is the minimum quantity of kerosene in litres (whole number) that should be mixed in the mixture so that the resulting mixture has 20% of kerosene ?
Elementary MathematicsPercentages
- A10 L
- B20 L
- C25 L
- DNot possible
Explanation
The 100 L mixture contains kerosene and turpentine in the ratio 3:2, i.e. 60 L kerosene and 40 L turpentine (60% kerosene). Adding kerosene can only raise its percentage above 60%, so a mixture containing 20% kerosene can never be obtained; it is not possible, option (d).