Mathematics, 16.09.2019 16:40, nastja

Bob takes the subway to work and uses an escalator at the railway station. if bob runs up 8 steps of the escalator, then it takes him 46.5 seconds to reach the top of the escalator. if he runs up 13 steps of the escalator, then it takes him only 39.0 seconds to reach the top. how many seconds would it take bob to reach the top if he did not run up any steps of the escalator?

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Bob takes the subway to work and uses an escalator at the railway station. if bob runs up 8 steps of...