A Diwali rocket going vertically up, explodes at the topmost point of its trajectory, at horizontal distance 550 m from the point of projection see figure. When the fragments strike the ground one of the fragments is found at a location 550 m east and 120 m north of the launch point. Second fragment is found at a location 550 m east and 60 m south of the launch point. First two fragments are of equal mass m and third