#### Question

A trader bought an article for Rs x and sold it for Rs 52, thereby making a profit of (x – 10) per cent on his outlay. Calculate the cost price.

#### Solution

C.P. of the article = Rs x

S.P. of the article = Rs 52

Profit = Rs (52 – x)

We know:

Profit% = `"Profit"/"C.P." xx 100`

`∴ x - 10 = (52 - x)/x xx 100`

`x^2 - 10x = 5200 - 100x`

`x^2 + 90x - 5200 = 0`

(x + 130)(x - 40) = 0

x = -130, 40

Since, C.P. cannot be negative. So, x = 40.

Thus, the cost price of the article is Rs 40.

Is there an error in this question or solution?

Solution A Trader Bought an Article for Rs X and Sold It for Rs 52, Thereby Making a Profit of (X – 10) per Cent on His Outlay. Calculate the Cost Price. Concept: Quadratic Equations.