A person walks up a stationary escalator in time `t_(1)`. If he remains stationary on the escalator, then it can take him up in time `t_(2)`. How much time would it take for him to walk up the moving escalator?

A person walks up a stationary escalator in time t_(1) . If he remains stationary on the escalator, then it can take him up in time t_(2) .How much time would it take him to walk up the moving escalator ?

At a metro station, a girl walks up a stationary escalator in time. t _(1), If she remains stationary on the escalator, then the escalator take her up in time t_(2). The time taken by her to walk up on the moving escalator will be

A boy reaches the airport and finds that the escalator is not working. He walks up the stationary escalator in time t_(1) . If the remains stationary on a moving escalator then the escalator takes him up in time t_(2) . The time taken by him to walk up on the moving escalator will be :