Escalator

In a shopping mall an escalator joins the first floor and the second floor. If a customer goes up along the escalator, walking at his usual walking speed, and the escalator is set to help him ascend, it takes 20 seconds to get to the second floor. If someone flips the switch so that the escalator makes it harder to climb the steps, it takes the customer a full minute.

How long does it take the customer to get up the escalator if the power is off so the escalator steps don't move?

How long does it takes the customer to get up the escalator if the steps do move, but he feels lazy and doesn't walk up the steps?

Originally posted by talzamir
In a shopping mall an escalator joins the first floor and the second floor. If a customer goes up along the escalator, walking at his usual walking speed, and the escalator is set to help him ascend, it takes 20 seconds to get to the second floor. If someone flips the switch so that the escalator makes it harder to climb the steps, it takes the customer a f ...[text shortened]... to get up the escalator if the steps do move, but he feels lazy and doesn't walk up the steps?

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Unless, of course, in the last case the escalator is moving down. Then he won't ever get anywhere by being lazy. 😉

Richard

Good point. ^_^