3.19 Repeat Problem 3.18 if for an instrument set up 850.0 ft from a tower with its telescope center 5.500 ft above the ground. The telescope is sighted horizontally to

a point5.500ft from the bottom of the steeple and then the angle to the top of the steeple is measured. It's 28°20. How tall is the tower?(Ans.:287.16ft)