A) \[\sqrt{34}:\sqrt{45}:\sqrt{39}\]
B) \[\sqrt{34}:\sqrt{45}:39\]
C) \[34\text{ }:\text{ }39\text{ }:\text{ }45\]
D) \[39\text{ }:\text{ }35\text{ }:\text{ }34\]
Correct Answer: B
Solution :
[b] We have \[\text{\vec{a}}\times \text{\vec{b}}=39\,\vec{k}=\text{\vec{c}}\] \[\text{Also }\!\!|\!\!\text{ \vec{a} }\!\!|\!\!\text{ =}\,\,\sqrt{34},\text{ }|\vec{b}|\,=\sqrt{45},\text{ }\!\!|\!\!\text{ \vec{c} }\!\!|\!\!\text{ =}\,\text{39 ;}\] \[\therefore \text{ }\!\!|\!\!\text{ \vec{a} }\!\!|\!\!\text{ :}|\vec{b}|\text{: }\!\!|\!\!\text{ \vec{c} }\!\!|\!\!\text{ }=\sqrt{34}:\sqrt{45}:39.\]You need to login to perform this action.
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