19. Five mark example problem VI

The horizontal distance between two buildings is $140 \ m$. The angle of depression of the top of the first building when seen from the top of the second building is $30^\circ$. If the height of the first building is $60 \ m$, find the height of the second building. $(\sqrt{3} = 1.732)$

 

Answer:

 

The height of the second building $=$  

 

(Note: Enter the number in the first box and the unit (short form)  in the second box. Round off the answers to $2$ decimal places.)