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A comment on World's steepest funicular railway opens in Switzerland. Parent comment

Re:World's steepest funicular railway opens in Switzerland by gshubert17 on Saturday December 16, 2017 @11:41AM (#15940246)
With slope in degrees and grade in percent,

100*tan(slope) = grade%

slope = arctan(grade%/100)

so 110% is about 47.7 degrees, and tan(90 degrees) is infinitely large.

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Re:World's steepest funicular railway opens in Switzerland by tmsldd on Saturday December 16, 2017 @11:52PM (#15944192)
Precisely. Math makes it clear to understand and settle down the discussion, thanks ;)
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