A reduction of 20% in the price of wheat enables Bhuvnesh to buy 5 kg more wheat for Rs. 320. The original rate (in rupees per kg) of wheat was :

Answer: Option A

Let the initial expenditure = 100 units

Increase in consumption
= $$\frac{20}{80}$$ = $$\frac{1}{4}$$
1 unit = 5 kg
Original consumption
= 5 × 4 = 20 kg
New consumption
= 5 × 5 = 25 kg
Original price = $$\frac{320}{20}$$ = 16 per kg