Question

Distance between $\sqrt{2}$ & -$\sqrt{2}$ on the number line approximately is _____________.

• A. 1.4 units
• B. 2.8 units
• C. 4.2 units
• D. 8.4 units

Answer 1

The correct option is B

2.8 units

Since $\sqrt{2}>-\sqrt{2}$,

Distance $=\left(\sqrt{2}\right)-(-\sqrt{2})$

$=\sqrt{2}+\sqrt{2}$

$=2\sqrt{2}$

$=2\times 1.4=2.8\text{units}$.