The radius of a circle is increased by 1

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 2D

Question:

The radius of a circle is increased by 12%, then area increased by?

Options:

27.44%

25.4%

24.44%

25.44%

Correct Answer:

25.44%

Explanation:

Using the formula for net effect = x% + x% + \(\frac{x\;× \;x}{100}\) %

⇒ Net Effect = 12% + 12% + \(\frac{12\;×\;12}{100}\)% = 25.44%