What is the value of $$\sqrt{\frac{1.21×0.9}{1.1×0.11}}$$​ ?

Correct option is B

Given:

​$$\sqrt{\frac{1.21×0.9}{1.1×0.11}}$$​

Solution: 

​$$\sqrt{\frac{1.21×0.9}{1.1×0.11}}$$   

Removing the decimals;

​$$\sqrt{\frac{121×9}{11×11}} \\ \ \\ = \sqrt{\frac{(11\times 11)× (3 \times 3)}{11×11}} \\ \ \\ =\sqrt {3 \times 3} \\ \ \\ = \bf 3$$​​