Rationalising factor of $\sqrt{5}$ is

Rationalising factor of $\sqrt{5}$ is
  1. $\sqrt{5}$
  2. $5$
  3. $\dfrac{1}{\sqrt{5}}$
  4. $25$

Solution

Multiply by $\sqrt{5}$ so the product becomes $5$ (rational).

Asked in: MH-SSC-9

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