A shopkeeper bought an article for Rs. 520. At what price (in Rs.) should he sell the article to make 20% profit?

Correct option is C

Given:
Cost Price (CP) = Rs. 520
Required Profit = 20%
Formula Used:
​$$\text{Selling Price (SP)} = \text{Cost Price (CP)} \times \left(1 + \frac{\text{Profit\%}}{100} \right)$$​​
Solution:
​$$\text{SP} = 520 \times \left(1 + \frac{20}{100} \right) \\= 520 \times \left( \frac{120}{100} \right) \\= \frac{520 \times 120}{100} \\= 624$$​​