Bihar Police Constable Model Paper 5

Given -
selling price = Rs. 25
Gain = 25%
Formula used -
selling price = (100 + profit percent) × cost price/100
Solution -
Let the cost price be Rs. x.
⇒ x = (25 × 100)/125
⇒ x = Rs. 20
∴ the cost price of the article be Rs. 20.