A rocket explods at the topmost paint of its trahectory. 550 m from the point of projection. 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 55om east and 65 m south of the launch point. first two fragments are of equal mass m and third fragment has mass 2 m . if all the three frogments struk the ground stmultaneously, what is the location of the fragments?