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Question


An escalator is moving up at a speed of 1 step per 2 seconds. A person is also moving up on that escalator. He started to walk at the rate of 2 steps per second. He reached the top of the escalator in 10 seconds. How many steps are there in that escalator?


A
24 steps
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B
25 steps
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C
26 steps
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D
28 steps
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Solution

The correct option is B 25 steps

Speed of the escalator = 0.5 steps per second

Speed of the person = 2 steps per second

Effective rate of the person = 2.5 steps per second

Number of steps = 2.5 × 10 = 25

Hence, option (B) is the correct answer.


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