The square root of $$\left( {{{272}^2} - {{128}^2}} \right)$$   is = ?

A. 144

B. 200

C. 240

D. 256

Answer: Option C

Solution(By Examveda Team)

$$\eqalign{ & = \sqrt {\left( {{{272}^2} - {{128}^2}} \right)} \cr & = \sqrt {\left( {272 + 128} \right)\left( {272 - 128} \right)} \cr & = \sqrt {400 \times 144} \cr & = \sqrt {57600} \cr & = 240 \cr} $$