The price of rice falls by 20%. How much rice can be bought now with the money that was sufficient to buy 20 kg of rice previously?

Answer: Option C

Let Rs. 100 be spend on rice initially for 20 kg.
As the price falls by 20%, new price for 20 kg rice,
= (100 - 20% of 100) = 80
New price of rice = $$\frac{80}{20}$$ = Rs. 4 per kg.
Rice can bought now at = $$\frac{100}{4}$$ = 25 kg.