A reduction of 25% in the price of rice enables a customer to obtain 3 kg. more for Rs. 189. what is the original price of rice per kg. ?
Answer Explanation
Let the original price = P and original quantity consumed = C 189 = P . C (1) Now price reduces by 25% and quantity increases by 3 kg 189 = 0.75P . (C+3) (2) Divide (1) by (2) 1 = C/(0.75)(C+3) 0.75C + 2.25 = C 2.25 = 0.25C C = 9 Original price = 189/9 = 21
