The price of an article of $R s 100$ . Its price is increased by $10 %$ , then again its is increased by $10 %$ . How much is an increased in total price?

20

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21

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110

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121

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Solution

The correct option is A $21$
Price of article $= R s 100$
Increase by $10 % = 100 \times \frac{10}{100} = 10$

Price becomes $= 110$
Increase by $10 % = 110 \times \frac{10}{100} = 11$

Price becomes $= 110 + 11$
$= 121$

Increase in price $= 121 - 100 = 21$ Rs.

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