The distance between the eye and the feet of a boy is 1.5 m. He is standing on a flat ground and a vertical plane mirror M is placed at a distance of 1.2 m from the boy, with its lower edge at a height of 0.3 m from the ground. Now the mirror is tilted about its lower edge as shown in the Figure. Find maximum value of angle θ for which the image of feet remains visible to the boy. [Take tan15∘=41]