A) \[5\,ft\]
B) \[6\,ft\]
C) \[8\,ft\]
D) \[4\sqrt{3}\,ft\]
Correct Answer: B
Solution :
In right \[\Delta ABC,\] |
\[\tan 30{}^\circ =\frac{AB}{BC}\,\,\,\,\,\,\,\Rightarrow \,\,\,\,\,\frac{1}{\sqrt{3}}=\frac{4}{BC}\,\,\,\,\,\Rightarrow \,\,\,BC=4\sqrt{3}ft\] |
So, option [d] is correct. |
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