Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time . On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time . The time taken by her to walk up on the moving escalator will be
Let is the velocity of Preeti on stationary escalator and d is the distance travelled by her
The time taken by her to walk up on the moving escalator will be