The reduction of 20% in the price of rice enables a person to obtain 50 kg more for Rs.450. Find the original price of rice per kg.

Rs.1 Rs.2 Rs.1.25 Rs.2.25

Rs.2.25

We Know 20% = \(\frac{1}{5}\), Consumption difference = 5 - 4 = 1 unit = 50 kg, then, 4 unit = 4 x 50 = 200 kg, So, Price of 200 kg is Rs. 450, Therefore price of 1 kg = \(\frac{450}{200}\) = Rs. 2.25.