A man standing on a moving escalator, completes a certain distance in time `t_(1)`. If the escalator does not move then man covers this distance in time `t_(2)` by walking.
(i) How much time will he take to cover the same distance if he move on the moving escalator in the same direction ?
(ii) How much time will he take to cover the same distance if he move on the moving escalator in the opposite direction ?