A person walks up a stationary escalator in time t1. If he remains stationary on the escalator, then it can take him up in time t2. How much timw would it take him to walk up the moving escalator
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Explanation:
firstly .
time t1 is distance per velocity of man
time t2 is distance per sum of velocity of man and velocity of escalator
finally
time t3 is the time taken by him to cover it when he is at rest
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