Question

If $\sqrt{2}=1.41\mathrm{then}\frac{1}{\sqrt{2}}=?$
(a) 0.075
(b) 0.75
(c) 0.705
(d) 7.05

Answer 1

$$\begin{gathered} \frac{1}{\sqrt{2}}=\frac{{\displaystyle 1}}{{\displaystyle \sqrt{2}}}\times \frac{\sqrt{2}}{\sqrt{2}}=\frac{\sqrt{2}}{2} \\ \mathrm{Given}:\sqrt{2}=1.41 \\ \mathrm{So},\frac{{\displaystyle \sqrt{2}}}{{\displaystyle 2}}=\frac{1.41}{2}=0.705 \end{gathered}$$
Hence, the correct answer is option (c).