Solve

Guides

Question

It takes one minute for a passenger standing on an escalator to reach the top. If the escalator does not move it takes him 3 minutes to walk up. How long will it take for the passenger to arrive at the top if he walks up the moving escalator?

Open in App

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

Was this answer helpful?

3