From a point P, the angle of elevation of a tower is such that its tangent is 3/4. On walking 560 metres towards the tower, the tangent of the angle of elevation of the tower becomes 4/3. What is the height (in metres) of the tower?

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?