What fraction of a clockwise revolution does the hour hand of a clock turn through when it goes from $3$ to $9$

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Solution

We know that $12$ hours $= 1$ full revolution
$1$ hour $= \frac{1}{12}$ revolution
When we go from $3$ to $9,$
we move $6$ hours
$= \frac{6}{12}$ revolution
$= \frac{1}{2}$ revolution

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