A person is travelling from the ground floor to the first floor in a mall using an escalator. Consider the following three separate cases. When the person is standing on the moving escalator it takes one minute for him to reach the first floor. If the escalator does not move it takes him $3$ minutes to walk up the stationary escalator to reach the top. How long will it take for the person to reach the top if he walks up the moving escalator?

30 sec

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45 sec

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40 sec

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35 sec

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Solution

The correct option is B $45 sec$
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The correct option is B 45 secundefined

The correct option is B $45 sec$
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