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A train leaves at 10:00 and arrives at 11:20 by the station clock. Through what angle does the HOUR hand turn during the journey?

Class 7Angles Around a PointLines and Angles
  • A80°
  • B30°
  • C40°
  • D480°

Step-by-Step Solution

The hour hand turns 30° in 60 minutes, so 0.5° per minute. The journey is 80 minutes: ° = 40°. (480° is what the minute hand turns; 30° ignores the extra 20 minutes.)
Answer: C) 40°

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