Question 133

Rama mixes 20% of kerosene to his petrol and then he sells the whole mixture at the price of petrol. If the cost price of the kerosene is 40% of the CP of petrol. What is the net profit %?

Solution

Let CP of petrol = $$Rs.$$ $$100$$

=> CP of kerosene = $$\frac{40}{100}\times100=Rs.$$ $$40$$

Now, 20% of kerosene is added, thus cost price of 1 litre petrol and 200 ml kerosene = $$(100+8)=Rs.$$ $$108$$

Selling price = $$(100+20)=Rs.$$ $$120$$

$$\therefore$$ Profit % = $$\frac{(120-108)}{108}\times100$$

= $$\frac{100}{9}=11.11\%$$

=> Ans - (A)

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