A dealer professes to sell his goods at cost price but uses a false weight and thus earns 25% profit. For weighing a kilogram, he uses a false weight of _________.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 800 gm.
Let us assume the dealer purchases 1000 gm at Rs. 1000
Let the dealer purchases X gm at Rs. 1000
Gain percentage = 25%
Then,
⇒ 25 = [(1000 - X)/X] × 100
⇒ X = 4000 - 4X
⇒ X = 800
∴ He uses weight of 800 gm.