A) 22.36 km
B) 2 km
C) 5 km
D) 20 km
Correct Answer: A
Solution :
\[\overrightarrow{AC}=\overrightarrow{AB}+\overrightarrow{BC}\] \[AC=\sqrt{{{(AB)}^{2}}+{{(BC)}^{2}}}\] \[=\sqrt{{{(10)}^{2}}+{{(20)}^{2}}}\] \[=\sqrt{100+400}\]\[=\sqrt{500}\]\[=22.36\,km\]You need to login to perform this action.
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