A) 25
B) 5
C) \[7\sqrt{3}\]
D) \[5\sqrt{2}\]
Correct Answer: D
Solution :
Since \[\mathbf{a}\,\bot \,\mathbf{b}\Rightarrow \mathbf{a}\,.\,\mathbf{b}=0\] \[|\mathbf{a}-\mathbf{b}{{|}^{2}}={{(\mathbf{a}-\mathbf{b})}^{2}}={{a}^{2}}+{{b}^{2}}-2\mathbf{a}\,.\,\mathbf{b}=25+25\] \[\Rightarrow \,\,|\mathbf{a}-\mathbf{b}|\,\,=5\sqrt{2}.\]
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