Answer:
Let AB be the height of electric tower and BC be its base.
it forms a right angled triangle
so
base=BC=50ft
hypotenuse =AC=?
perpendicular=AB=200ft
by using Pythagoras law
h²=p²+b²
AC²=200²+50²
AC=√42500
AC=206.15ft
206.15ft is the length of wire.