Question

please help urgently needed.....

Answer 1

By the Given you can Understand the Setup here.
By Applying Sin on angle 60.
Sin60=opp/hypo=h/100.
and sin60=√3/2.
√3/2=h/100
√3=h/50
h=√3 * 50=1.73 * 50
h=86.5 m