The cost price of an article is $x$ rupees. It is marked up by 100 percent and after giving a discount of 30 percent, it is sold for Rs 420. What is the value of $x$ (in rupees)?

Explanation

The cost price of the article = Rs. $x$ $\because$ The marked price is marked 100 percent higher.' $\therefore$ Marked price = $2x$ As per the question 30% discount is given and sold for Rs. 420. $\therefore 2x \times \frac{70}{100} = 420$ $x = \frac{420 \times 10}{14}$ $x = Rs 300$