Prop or pillar roots are

Prop roots are :-

Prop roots are :-

Supply the appropriate scientific term for Pillar like roots appearing from large horizontal branches.

Two pillars of equal heightstand on either side of a roadway which is 150 m wide. From a point on the roadway between the pillars, the elevations of the top of the pillars are 60^@ and 30^@ . Find the height of the pillars and the position of the point