Hazard tree calculation

How do you factor in, the wind velocity and age of the tree?

The wording of the question implies the road is above the tree.

The tree will fall on a slope angle whose tan=0.35, i.e. 19.29 deg.
Assuming the tree falls maximally up the slope, it will be the hypotenuse of a triangle whose opposite side is 200 ft.
Height=200/sin(19.29)
Height=605.42 ft.... That's unlikely ! ...Check your wording.

65ft

Sine ( 35 degrees ) = 0.57357 = opposite / hypotenuse = 200 / tree

Tree = 349 feet

?.
Percentage slope is defined as TANGENT.
That's why the wording needs to be checked.

Are you applying (standardised) gravitational variance or electromagnetic containment?