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Question

- 45 sec
- 30 sec
- 40 sec
- 35 sec

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Solution

Verified by Toppr

therefore the speed of the man with escalator not moving =(d1)m/min

therefore the speed of the escalator with the man at rest=(d3)m/min

when both the main and the escalator are moving, effective speed=(d3+d) m/min

=4d3 m/min

Therefore time taken when both men and escalator are moving=distancespeed=d4d3

34min=45seconds

Hence (B) is correct answer

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