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My scooty gives an average of 40 kmpl...

My scooty gives an average of 40 kmpl of petrol. But after recent filling at the new petrol pump, its average dropped to 38 kmpl. I investigated and found out that it was due to adulterated petrol. Petrol pumps add kerosene, which is `2/3` cheaper than petrol, to increase their profits. Kerosene generates excessive smoke and knocking and gives an average of 18 km per 900 ml. If I paid Rs 30 for a litre of petrol, what was the additional amount the pump-owner was making? (a) Rs 1.75 (b) Rs 1.80 (c) Rs 2 (d) Rs 2.30

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