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Which of the following is an irrational number between 4 and 5?

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Which of the following is an irrational number between 4 and 5?

 A) \(\sqrt{ 20}\)

B) √9

C) \(\sqrt{ 4.5}\)

D) 4.5

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2 Answers

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Correct option is (A) \(\sqrt{20}\)

\(\because\) 16 < 20 < 25

\(\Rightarrow\) \(\sqrt{16}<\sqrt{20}<\sqrt{25}\)

\(\Rightarrow\) \(4<\sqrt{20}<5\) and \(\sqrt{20}\) is an irrational number.

+1 vote
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Correct option is  A) \(\sqrt{ 20}\)

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