A person walks up a stationary escalator in the time . If he remains stationary on the escalator, then it can take him up in time . Determine the time it would take to walk upon the moving escalator ?
Explanation for the correct answer
Step 1. As we know that:
Suppose the length of the escalator =
Speed of man w.r.t escalator =
Speed of escalator =
Step 2. Speed of man w.r.t ground when the escalator is moving,
Step 3. Time taken by the man to walk on the moving escalator,
Hence, the correct option is (A).