Find the square root of $477.4225.$ [ $4$ MARKS]

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Solution

Concept : $1$ Mark
Division method : $2$ Marks
Conclusion : $1$ Mark

Here the number of decimal places is already even.
So, place bars on the integral (intergers before decimal) and decimal parts and proceed as given below

$\begin{matrix} 21.85 2 & ¯ ¯ ¯ 4 ¯ ¯¯¯¯ ¯ 77 . ¯ ¯¯¯¯ ¯ 42 ¯ ¯¯¯¯ ¯ 25 4 41 & 77 41 428 & 3642 3424 4365 & 21825 218250 \end{matrix}$

$\sqrt{477.4225} = 21.85$

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