A dishonest shopkeeper claims to sell his goods at cost price but uses a weight of 800 gm in place of the standard 1 kg weight. What is his gain percent?

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None of the above.

answer is A.

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Detailed Solution

Concept- We'll start by assuming that the cost per kilogram is Rs. 100. The calculation for gain percentage will therefore be as follows, gain percentage

.
Assume that the cost of the items is Rs. 100 per kilogram or Rs. 100 per 1000 gram. Additionally, the merchant claims to be selling his items at cost but actually uses an 800 gram weight rather than the usual 1 kg weight.
Therefore, the selling price is equal to the cost of 1 kilogram of products, which suggests that it is equal to Rs. 100.
The cost price is equal to the cost of the 800 gm products because the actual weight was 800 gm.
We are aware that 100 rupees is equal to 100 grams of goods.
Cost of 1 gm of goods

Consequently, the cost price is equal to the cost of the 800 g of items, which

Gain percentage