The figure is below attached. The values of all angles are given in the figure.

From the theorem of sinuses in triangle `ABD` one can write

`(AB)/sin(7) =(BD)/sin(6) rArr BD = AB*sin(6)/sin(7)`

From the theorem of sinuses in triangle `BCD` one can write

`(CD)/sin(13) =(BD)/sin(90) rArr CD =BD*sin(13)`

Therefore

`CD = AB*sin(6)/sin(7)*sin(13)`

`CD = 1100*sin(6)/sin(7)*sin(13) =212.23 m`

**Answer: the height of the tower is 212.23 m**