Question

The angle of elevation of a tower at a point distant dmetres from its base is $30 ^ { \circ }$. If the tower is 20 meters high, then the value of d is

• A. $10 \sqrt { 3 } \mathrm {~m}$
• B. $\frac { 20 } { \sqrt { 3 } } m$
• C. $20 \sqrt { 3 } \mathrm {~m}$
• D.

Answer 1

Answer: (C)

$20 \sqrt { 3 } \mathrm {~m}$

Answer 2

$\frac { d } { 20 } = \cot 30 ^ { \circ }$