Magnitude of vector which comes on addition of two vectors, $6\hat i + 7\hat j$ and $3\hat i + 4\hat j$ is
$\sqrt {136} $
$\sqrt {13.2} $
$\sqrt {202} $
$\sqrt {160} $
Magnitude of vector which comes on addition of two vectors, $6\hat i + 7\hat j$ and $3\hat i + 4\hat j$ is
$\vec R = \vec A + \vec B$= $6\hat i + 7\hat j + 3\hat i + 4\hat j$ = $9\hat i + 11\hat j$
$|\vec R|\; = \;\sqrt {{9^2} + {{11}^2}} = \sqrt {81 + 121} = \sqrt {202} $