A) \[7\sqrt{3}\]
B) \[7-\sqrt{3}\]
C) \[7+\sqrt{3}\]
D) 14
Correct Answer: A
Solution :
[a] In \[\Delta ADB,\,\,\,\tan 45{}^\circ =\frac{AD}{BD}=\frac{AD}{21}\] \[AD=21\,m\] In \[\Delta ADC,\,\,\,\tan \,60{}^\circ =\frac{AD}{x}\] \[x=\frac{21}{\sqrt{3}}=7\sqrt{3}\,m\]You need to login to perform this action.
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