1. 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 %?
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By: anil on 05 May 2019 02.27 am
Let CP of petrol = $$Rs.$$ $$100$$ => CP of kerosene = $$frac{40}{100} imes100=Rs.$$ $$40$$ Now, 20% of kerosene is added, thus cost price of 1 litre petrol and 200 ml kerosene = $$(100+8)=Rs.$$ $$108$$ Selling price = $$(100+20)=Rs.$$ $$120$$ $$ herefore$$ Profit % = $$frac{(120-108)}{108} imes100$$ = $$frac{100}{9}=11.11\%$$ => Ans - (A)
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