A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:

145°
150°
155°
160°

Correct answer: 155°

Solution

From noon to 5:10, the elapsed time is 5 hours 10 minutes = 5 + 10/60 hours. The hour hand moves 30° per hour, so the total rotation is 5.1667 × 30° = 155°.

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