Question 192352
if  a  drawing  were  made  showing  a  line  from  a  point  on  the  ground  thru  top  of  tower  and  then  thru  top  of  bldg,  we  could  see  two  similar  triangles.  Similar  triangles  have  sides  proportional.

in  our  case   h/50.5=2.9/1.58

cross  multiplying

1.58 *h=50.5 * 2.9 

1.58  *h = 146.45

divide  by  1.58

h=92.68987=  92.69