Because of a 20% fall in the price of rice, a man can buy 5 kg more rice for ₹800. What was the original price per kg?
A. ₹45
B. ₹36
C. ₹40
D. ₹32
A. ₹45
B. ₹36
C. ₹40
D. ₹32
Best answer
Answer: C. ₹40
Answer: (C) ₹40
Shortcut: the 20% saved on ₹800 = ₹160 buys the extra 5 kg, so the new price = 160 ÷ 5 = ₹32 per kg.
Original price = 32 ÷ 0.8 = ₹40 per kg.
Check: at ₹40 he gets 20 kg; at ₹32 he gets 25 kg.
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