a 20 reduction in the price of oil makes a person buy 15 liter more oil for 4500 what is the initial price per litre of oil

1 thought on “a 20 reduction in the price of oil makes a person buy 15 liter more oil for 4500 what is the initial price per litre of oil”

1. Answer:

   A reduction of 20% in the price of sugar enables a housewife to purchase 6 kg more for Rs. 240. What is original price per kg of sugar.

   A. Rs. 10 per Kg

   B. Rs. 8 per Kg

   C. Rs. 6 per Kg

   D. Rs. 5 per Kg

   Answer: Option A

   Solution(By Examveda Team)

   It is based on inverse proportion or product constancy concept. Reduction in price 20% amount of sugar will increase 25%

   It means,

   25% = 6 Kg. So,

   Initially, total Sugar = 6 × 4 = 24Kg. Thus,

   Original price of the sugar was,

   24024

   = Rs. 10 per kg.

   Note:

   Let initial price of 100 kg Sugar was Rs. 100.

   Now, 20% decrease in rate then rate of 100 kg sugar would be Rs. 80.

   So,

   Rs. 80 = 100 kg sugar.

   Rs. 1 = 10080

   kg sugar.

   Rs. 100 = 100×10080

   = 125 Kg sugar.

   Increment in sugar = 25 kg.

   % increment = 25×100100

   = 25%.

   Means 20% rate decrease, 25% of consumption increase.

   Reply