You can also put in a hill, 15% is a pretty steep hill, 20% is probably walking material for most of us.
wobby wrote:Just trying to understand the maths here and relate it to my daily commute down greenmount hill (by car). Greenmount is a 270 metre drop over 6000 metres so about 4.5%. 15% sounds like an Alp to me and not likely to be encountered on the flatlands.
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