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A reduction of 25% in the price of rice enables a person to buy 10 kg more rice for Rs. 600. What is the reduced per kg price of rice?1). Rs. 152). Rs. 203). Rs. 254). Rs. 30 |
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Answer» Expenditure = Price ? Quantity Since expenditure is same, Price ? Quantity = constant Let the OLD price and old quantity of rice PURCHASED be P and Q respectively. We can write, PQ = 0.75P ? (Q + 10) ⇒ PQ = 0.75PQ + 7.5P ⇒ 0.25PQ = 7.5P ⇒ Q = 30 kg So, New quantity purchased = 40 kg Total expense = Rs. 600 ∴ New Price PER kg = $(\frac{{600}}{{40\;}} = Rs.15)$ |
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