Civil Service Exam Reviewer · Word Problems · hard
What is the smaller angle between the hour and minute hands of a clock at 10:20?
- 180°
- 190°
- 185°
- 170°
Answer
D. 170°
Solution
Angle = |30H − 5.5M| = |30(10) − 5.5(20)| = 190°; the smaller angle is 360° − that = 170°. (The hour hand moves 0.5° per minute.)
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