A person walks up a stalled escalator in 
. When standing on the same escalator, now moving, he is carried up in 
. The time taken by him to walk up the moving escalator is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let distance travelled 
Speed of a person walks up 
Speed of escalator 
Total speed 
The time taken by him 
walk up the moving escalator is
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