A) \[\sqrt{136}\]
B) \[\sqrt{13.2}\]
C) \[\sqrt{202}\]
D) \[\sqrt{160}\]
Correct Answer: C
Solution :
\[\vec{R}=\vec{A}+\vec{B}\]= \[6\hat{i}+7\hat{j}+3\hat{i}+4\hat{j}\]= \[9\hat{i}+11\hat{j}\] \ \[|\vec{R}|\ =\ \sqrt{{{9}^{2}}+{{11}^{2}}}=\sqrt{81+121}=\sqrt{202}\]
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