Question

The value of $\sqrt{0.01}+\sqrt{0.81}+\sqrt{1.21}+\sqrt{0.0009}$ is :

• A. 2.03
• B. 2.1
• C. 2.11
• D. 2.13

Answer 1

Answer: (D)

2.13

To find $\to$ value of $\sqrt{0.01}+\sqrt{0.81}+\sqrt{1.21}+\sqrt{0.0009}$

$\sqrt{0.01}=\sqrt{1\times {10}^{-2}}={10}^{-1}$

$\sqrt{1.21}=\sqrt{(1.1{)}^2}=1.1$

$\sqrt{0.81}=\sqrt{(0.9{)}^2}=0.9$

$\sqrt{0.0009}=\sqrt{(0.03{)}^2}=0.03$

Value of $\sqrt{0.01}+\sqrt{0.81}+\sqrt{1.21}+\sqrt{0.0009}=0.1+0.9+1.1+0.03$

$\sqrt{0.01}+\sqrt{0.81}+\sqrt{1.21}+\sqrt{0.0009}=2.13$