A and B are two points on the ground, on the same side of a tree, 50 meters apart. The angles of elevation from these points to the top of the tree are 60° and 30°, respectively. What is 40% of the height of the tree (in m)?

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?