Through what angle in degrees does the minute hand of a clock rotate in $20 m i n$ ?

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Solution

We know that,
In $60 m i n$ a clock makes an angle of $360 °$
So,
$1 m i n$ a clock makes an angle of $\frac{360 °}{60} = 6 °$
Therefore,
In $20 m i n$ a clock makes an angle of $20 \times 6 ° = 120 °$
Hence, the minute hand of a clock rotates in $20 m i n$ maken an angle of $120 °$

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