Find the simplest value of 2 50 + 18 - 72 = ?(given 2 = 1.414)

Answer: Option B

$$\begin{array}{rl}& \text{2}\sqrt{50}\text{ + }\sqrt{18}-\sqrt{72}\\ & \Rightarrow \text{2}\times \text{5}\sqrt{2}\text{ + 3}\sqrt{2}-6\sqrt{2}\\ & \Rightarrow 13\sqrt{2}-6\sqrt{2}\\ & \Rightarrow 7\sqrt{2}\\ & \Rightarrow 7\times 1.414\\ & \Rightarrow 9.898\end{array}$$