1.

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

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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