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Q. No.Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time \(t_1.\) On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time \(t_2.\) The time taken by her to walk upon the moving escalator will be:
| 1. | \(\dfrac{t_1t_2}{t_2-t_1}\) | 2. | \(\dfrac{t_1t_2}{t_2+t_1}\) |
| 3. | \(t_1-t_2\) | 4. | \(\dfrac{t_1+t_2}{2}\) |
Subtopic: Â Relative Motion in One Dimension |
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From NCERT
NEET - 2017
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