From the top of a \(16 \ m\) high building, the angle of elevation of the top of a cable tower is \(60^{\circ}\) and the angle of depression of its foot is \(30^{\circ}\). Find the height of the tower.
 
Answer:
 
The value of tani=13.
 
The value of tani=3.
 
The height of the tower \(=\)  .
 
(Note: Enter the number in the first box and the unit (short form) in the second box.)