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HCU MCA 2017 Paper

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Question : 16

Total: 75

A physicist, who is in a hurry, walks up an upward moving escalator at the rate of one step per second, 20 steps bring him to the top. Next, day, he goes at two steps per seconds reaching the top in 32 steps. How many steps are there in the escalator

40
80
120
140

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