At a metro station, a girl walks up a stationary escalator in time 
. If she remains
stationary on the escalator, then the escalator takes her up in time 
. The time taken by her to walk up on the moving escalator will be:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let displacement is 
, then
Velocity of girl. 
Velocity of escalator, 
Net velocity of the girl 
If 
is total time taken in covering distance 
, then 
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