The radius of a circle is increased by 2

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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 25%, then area increased by?

Options:

56.4%

50.25%

56.25%

46.25%

Correct Answer:

56.25%

Explanation:

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

⇒ Net Effect = 25% + 25% + $\frac{25\;×\;25}{100}$% = 56.25%