​$$\sqrt{12.25} =$$​​

Correct option is A

Given
Expression = $$\sqrt{12.25}$$​​

Formula Used
Square root calculation method.
​$$\sqrt{\frac{a}{b}} = \frac{\sqrt{a}}{\sqrt{b}}$$​​

Solution
Remove the decimal point to convert into a fraction:
​$$\sqrt{12.25} = \sqrt{\frac{1225}{100}}$$​​
​$$= \frac{35}{10}$$​​
= 3.5
So the correct answer is (a)