Module 1: Ratio and proportion

XSIQ
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Core Mathematics - Gears

Gears

Gear ratios are an example of . This means as one quantity increases the
other quantity decreases. This could be considered a "special case" ratio
question, as all other ratios dealt with to date involve .

Road racing cyclists change gears to suit the conditions:

* pedalling faster in lower gears but going slower up hills or

* pedalling slower in higher gears but going faster down hills.

As this problem involves inverse proportion, the rule becomes:

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