If the side of a square is increased by 10\% , then percentage increase in its area will be: - Mathematics MCQ UPTET 2021 Memory Based Paper 1 2026 | ExamTest.live | ExamTest.live

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If the side of a square is increased by 10%, then percentage increase in its area will be:

A $11%$
B $21%$
C $42%$
D $100%$

Solution & Step-by-step Explanation

Using successive percentage change formula a + b + \frac{ab}{100} :Here, both a and b are + 10% . Percentage Increase = 10 + 10 + \frac{10 \times 10}{100} = 20 + 1 = 21%

Practice this question

Try it yourself before checking the explanation above.

If the side of a square is increased by 10%, then percentage increase in its area will be:

A

11%

B

21%

C

42%

D

100%

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Percentages Area Change

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