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23Sep/099

Up an Escalator

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Jimmy takes the underground train to work and uses an escalator at the railway station. If Jimmy runs up 7 steps of the escalator, then it takes him 28.5 seconds to reach the top of the escalator. If he runs up 13 steps of the escalator, then it takes him only 19.5 seconds to reach the top.

How many seconds would it take Jimmy to reach the top if he did not run up any steps of the escalator at all?

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  1. its 30 seconds!!!

  2. x- time to reach by escalator
    y- time to take 1 step

    x-7y=28.5
    x-13y=19.5
    on solving,
    x=49sec. Ans

  3. jimmy takes 39 sec to reachn the top without running any step

  4. I solve the answer it comes out to be 55.5 seconds

  5. 39 sec.
    not sure …………..just tried a shortcut

  6. I tried this puzzle bt nt able to get the ri8 answer…
    Can any1 gimme the solution of the puzzle..??


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