A vendor started selling vegetables at ₹10 per kg, but couldn’t find buyers at this rate. So he reduced the price to ₹7.2 per kg, but uses a faulty weight of 900 g instead of 1 kg. Find the percentage change in the actual price.
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 20%.
The vendor sells vegetables at ₹10 per kg.
The price of vegetables per gram = 10/1000 = ₹0.01
The vendor reduced the price to ₹7.2 per kg but used a faulty weight of 900 g instead of 1 kg.
Now, the price of vegetables per gram = 7.2/900 = ₹0.008
Required percentage = [(0.01 - 0.008)/0.01] × 100 = (0.002/0.01) × 100 = 20%
Therefore, the percentage change in the actual price is 20%.