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At a metro station, a girl walks up a stationary escalator in time t1 . If she remains stationary on the escalator, then the escalator take her up in time t2. The time taken by her to walk up on the moving escalator will be
  • a)
    (t1 + t 2)/2
  • b)
    t1t2/(t– t1)
  • c)
    t1t2/(t+ t1)
  • d)
    t– t2
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
At a metro station, a girl walks up a stationary escalator in time t1....
In the situation of a stationary escalator and moving girl velocity,

In the situation of stationary girl and moving escalator velocity,

If both escalator and girl keep moving then distance,
L = (V + V1) t3   ----(3)
Where t3 is time to cover that distance when both girl and the escalator keep moving.
Using equations (1), (2), and (3) we get:

Then, time is taken 
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At a metro station, a girl walks up a stationary escalator in time t1. If she remains stationary on the escalator, then the escalator takeher up in time t2. The time taken by her to walk up on the moving escalator will bea)(t1+ t2)/2b)t1t2/(t2– t1)c)t1t2/(t2+ t1)d)t1– t2Correct answer is option 'C'. Can you explain this answer?
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At a metro station, a girl walks up a stationary escalator in time t1. If she remains stationary on the escalator, then the escalator takeher up in time t2. The time taken by her to walk up on the moving escalator will bea)(t1+ t2)/2b)t1t2/(t2– t1)c)t1t2/(t2+ t1)d)t1– t2Correct answer is option 'C'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about At a metro station, a girl walks up a stationary escalator in time t1. If she remains stationary on the escalator, then the escalator takeher up in time t2. The time taken by her to walk up on the moving escalator will bea)(t1+ t2)/2b)t1t2/(t2– t1)c)t1t2/(t2+ t1)d)t1– t2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for At a metro station, a girl walks up a stationary escalator in time t1. If she remains stationary on the escalator, then the escalator takeher up in time t2. The time taken by her to walk up on the moving escalator will bea)(t1+ t2)/2b)t1t2/(t2– t1)c)t1t2/(t2+ t1)d)t1– t2Correct answer is option 'C'. Can you explain this answer?.
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