$\sqrt{0.4}$ is a/an\

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Professor PC Thomas Classes · Answer

(d): $\sqrt{0.4}=\sqrt{\frac{4}{10}}=\frac{2}{\sqrt{10}}$\ $\because \quad 2$ is a rational number and $\sqrt{10}$ is an irrational number.\ $	herefore \quad \sqrt{0.4}$ is an irrational number.