37 20 800 m

A wind tower at the top of a hill casts a shadow 30 m long along the side of the hill. An observer at the farthest edge of the shadow from the tower estimates the angle of elevation to the top of the tower to be 34°. If the slope of the hill is 13° from the horizontal, how high is the tower to the nearest metre?

A man is standing on the top of a cliff. He makes an angle of depression of 25° when he looks as a boat 250km from the bottom of the cliff. How tall is the cliff the man is standing on?

Suppose that you stand 60 ft away from building. You angle of elevation to the top of the building is 54.5°. Your eye level is approximately 5.5 ft above the ground. How tall is the building?