The two palm trees are of equal heights and are standing opposite each other on either side of the river, which is 80 m wide. From a point O between them on the river the angles of elevation of the top of the trees are `60^(@)` and `30^(@)`, respectively. Find the height of the trees and the distances of the point O from the trees.
OR
The angles of depression of the top and bottom of a building 50 meters high as observed from the top of a tower are `30^(@)` and `60^(@)` respectively. Find the height of the tower, and also the horizontal distance between the building and the tower.