A 1.5 m tall boy is standing at a distance of 3 m from a 4 m high light post. The light from the top of the post casts his shadow. What is the length of the boy's shadow?

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?