Question 334030
Angle of elevation of cliff base = 30/60 deg  ( 60 ' = 1 deg)
distance on ground = 200 feet
so height of cliff = 200*Tan(1/2)
..
Angle of elevation of wall top = 45/60 deg
distance on ground = 200 feet
so height of cliff+ wall  = 200*Tan(3/4)


200*tan(3/4)-200*tan(1/2) = height of wall
= 77.05  feet