The angle of elevation, i.e. the angle from the horizontal, of the top of a flagpole from a point on the ground level with the base and 20 m from it is 40°. What is the height of the flagpole? A road...

The angle of elevation, i.e. the angle from the horizontal, of the top of a flagpole from a point on the ground level with the base and 20 m from it is 40°. What is the height of the flagpole?

A road up an incline rises by 12 m for every 100 m of roadway. At what angle to the horizontal is the roadway?