If the angle of elevation of a tower from a distance of 100 metres from its foot is 60?, the height of the tower is
A. $$100\sqrt 3 \,m$$
B. $$\frac{{100}}{{\sqrt 3 }}\,m$$
C. $$50\sqrt 3 \,m$$
D. $$\frac{{200}}{{\sqrt 3 }}\,m$$
Answer: Option A
Solution(By Examveda Team)
Let AB be the tower and a point P at a distance of 100 m from its foot, angle of elevation of the top of the tower is 60°Let height of the tower = h
$$\eqalign{ & {\text{Then in right }}\Delta ABP \cr & \tan \theta = \frac{{{\text{Perpendicular}}}}{{{\text{Base}}}} = \frac{{AB}}{{PB}} \cr & \Rightarrow \tan {60^ \circ } = \frac{h}{{100}} \Rightarrow \sqrt 3 = \frac{h}{{100}} \cr & \Rightarrow h = 100\sqrt 3 \cr & \therefore {\text{Height}}\,{\text{of}}\,{\text{tower}} = 100\sqrt 3 \cr} $$
Related Questions on Height and Distance
A. 173 m
B. 200 m
C. 273 m
D. 300 m
E. None of these
A. 4 √3 units
B. 8 units
C. 12 units
D. Data inadequate
E. None of these
A. 21.6 m
B. 23.2 m
C. 24.72 m
D. None of these
Join The Discussion