The difference in the lengths of the shadows of a vertical pole cast by the sun at two different times of the day is 20√3/3 m. If the angles of elevation of the top of the pole measured from the ends of the shadows on the same side of the pole are 60° and 30° respectively, what is the height of the pole?

Two points, A and B, are given. If the Reduced Level (RL) of point A is 100.00 m, find the difference in RL between A and B given that the back sight to A is 2.0 m and the fore sight to B is 1.5 m.

A 24 m long ladder is leaning against a wall. If the ladder makes an angle of 30° with the wall, what is the distance (in m) of the foot of the ladder from the wall?