One end of a light inextensible string of length
One end of a light inextensible string of length a is attached to vertex A of a rectangular lamina ABCD of weight W and the other
end is attached to a point on a smooth vertical wall. Here AB =a & BC=3a , 3 . The lamina is in equilibrium in a plane
perpendicular to the wall and vertex B is in contact with wall. Show that the string makes an angle 4/pie with the wall. Find the tension in the string and the reaction exerted on vertex B by the wall.