Question

What is the distance between $\sqrt{2}$ & -$\sqrt{2}$ on the number line approximately?

Answer 1

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

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

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

$=2\sqrt{2}$

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