Delhi Police Constable Exam Model Paper 5

GIVEN:
Selling price of the article is Rs. 432
Profit gained on the article is 35%
FORMULA USED:
Selling price = {1 + (Profit %) /100} × Cost Price
CALCULATIONS:
⇒ $432=1+\left(\frac{35}{100}\right)\times$ Cost Price
⇒ Cost Price = 432/ 1.35 = 320
Hence, Cost price of the article is Rs. 320.
Alternate solution
Such questions can be solve easily by assuming Cost price 100x.
Hence, profit = 35x and selling price = 135x
According to question,
$135\mathit{x}=432$
⇒ x = $\frac{432}{135}$
∴ Cost price = $100\mathit{x}=\left(\frac{432}{135}\right)\times 100=320.$