Oil equal to 20 of the weight of ground nut is extracted in a mill The matter left after extraction ...........

Quantitative Aptitude (CGL) Percentage

Oil equal to 20% of the weight of ground nut is extracted in a mill. The matter left after extraction is sold as cattle feed at the rate of Rs 12.5/kg. The groundnuts are bought at Rs 20/kg. The processing cost is Rs 5/kg. At what price (Rs per kg) should the oil be sold to earn 20% profit on total costs (Total cost = Cost of groundnuts and Processing costs)?

250

150

200

100

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Explanation:

By the given information, 0.8 kg residue of 1 kg groundnut was sold at Rs.12.5 per kg, that is at Rs.10.
To have 20% profit on total cost of Rs.25 for 1kg, the oil and its residue for 1kg groundnut must be sold at a total price of 1.20=6/5th of Rs.25, that is, Rs.30.
As the residue 0.8 kg of 1 kg groundnut is sold at Rs.10, the oil of 0.2 kg must be sold for Rs.20, that is at Rs.100 per kg.