Question

Find the square root of the following decimal number

31.36

• A. 5
• B. 5.6
• C. 4.5
• D. 6

Answer 1

The correct option is B

5.6

We use long division method to find the square root of 31.36. For that, we will group 2 numbers from right to left and then proceed with the division.

$\begin{array}{cc}& 5.6\\ 5& \overline{31}\cdot \overline{36}\\ & -25\\ 106& 636\\ & -636\\ & 0\end{array}$

Hence, the square root of 31.36 is 5.6