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```
A person walks up at stationary escalator in time t1. If he remains stationary on the escalator,then it can take him up in time t2.How much time would it take him to walk up the moving escalator?
A person walks up at stationary escalator in time t1. If he remains stationary on the escalator,then it can take him up in time t2.How much time would it take him to walk up the moving escalator?

```
3 years ago

John Sharon Sandeep
41 Points
```							This problem can be done using physics speed time relation or mathematical work time (W in unit time= 1/T) relation.Both are same.ðŸ”œ#Since time taken by mans foot= t1.  Therefore steps covered in unit time= 1/t1#And time taken by an escalator step=t2. Therefore steps covered in unit time= 1/t2 ðŸš©thus steps covered in unit time when escalator moves and man too moves= 1/t1 +  1/t2 = (t1+t2)/t1t2.â˜ºthus time taken to complete the distance=1/(t1+t2)/t1t2= t1t2/(t1+t2)
```
3 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions