Two successive price increases of 10% each on an article are equivalent to a single price increase of :

Answer: Option C

Let the original price be Rs. $$x$$
New final price :
= 110% of (110% of Rs. 100)
= Rs. $$\left(\frac{110}{100}\times \frac{110}{100}\times 100\right)$$
= Rs. 121
∴ Total increase :
= (121 - 100)%
= 21%