Arif starting from x goes to y. At the same time Boby starts from y and goes towareds x. Once Arif reachs y, he changes his direction and returns to x. Once Boby reaches x, he changes his direction and returns to y. Throughtout the journey, Arif travels a

প্রশ্নঃ Arif starting from x goes to y. At the same time Boby starts from y and goes towareds x. Once Arif reachs y, he changes his direction and returns to x. Once Boby reaches x, he changes his direction and returns to y. Throughtout the journey, Arif travels a