Dayton
Lv 7
Dayton asked in Science & MathematicsGeography · 5 months ago

UK Driving - what does the percentage rating of a hill actually mean?

What is a 10percent hill for example

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• Anonymous
3 months ago

Source(s): Women wear headscarves tied at the front to prevent headaches from sky pushing down and to prevent throat cancer. Mega-tsunami for New York will be 400 meters; then engulfed-in-lava Los Angeles will be flooded too; also, asteroid destroys Gulf of Mexico; only Alaska, Eurasia, and Africa remain (obviously without coasts). 1st big earthquake in Russia; 2nd bigger one in China (will be split in half; radiation!); 3rd biggest will be in the USA (Greek Orthodox monk Elidiy from Africa); forgive me.
• 5 months ago

1 foot up or down for every 10 feet horizontal.

• MARK
Lv 7
5 months ago

It refers to the gradient of the slope which you are driving up or down. It is advise that you should change you gears appropriately. It is only given on particularly steep slopes where changing gears is advised.

• John P
Lv 7
5 months agoReport

UK and continental Europe use the percentage system for hills. Possibly much of the world now uses the percentage system for hills. A 10% hill is "1 in 10" in old British reckoning. 20% = "1 in 5".

• 5 months ago

• Clive
Lv 7
5 months ago

That'll be a 1 in 10 slope - 1 metre or yard up for every 10 metres or yards along. A 100% hill would be a 1 in 1, a 45 degree slope.

• Lôn
Lv 7
5 months ago

It means you go up vertically 1 metre for every 10 metres you travel horizontally.

• Anonymous
5 months ago

Divide 100 by the percent to give 1 in X ie.

10% is 1 in 10,

12.5% is 1 in 8,

20% is 1 in 5,

• 5 months ago

It's a measure of the gradient. A 10% hill is also known as 1:10 or 1 in 10. For every ten metres of length, it rises one metre.

A 25% hill is 1:4 or 1 in 4, which is pretty steep but not the steepest you might meet in the UK. The steepest I have driven up was 33% or 1 in 3.

• 5 months ago

Look at it as if it is almost equivalent to Degrees.

45 Degrees was a rise of 1ft height in 1ft travelled (incredibly steep 1:1).

Anyway: see the chart

• Land-shark
Lv 7
5 months agoReport

100% instead or 90 degrees, that's what I was getting at obviously. 50% will be 1:1 like 45 degrees is. Just a visualisation if you understand what such a thing is.

• Yes
Lv 7
5 months ago

They're referring to the gradient of the hill you're going up or down in order to shift into the correct gears.

• Land-shark
Lv 7
5 months agoReport

It is incredibly helpful to know the grade of a hill you are approaching!