Math Problem Statement

Find the angle between the hour hand and the minute hand of a clock when the time is 3:25.

Solution

The question asks to find the angle between the hour hand and the minute hand of a clock when the time is 3:25.

Step-by-step solution:

  1. Minute hand angle: The minute hand moves 360° in 60 minutes, so it moves 6° per minute. At 25 minutes, the minute hand will be at: 25×6=15025 \times 6 = 150^\circ from the 12 o'clock position.

  2. Hour hand angle: The hour hand moves 360° in 12 hours, or 30° per hour (since 360° / 12 = 30°). At exactly 3:00, the hour hand would be at: 3×30=903 \times 30 = 90^\circ But at 3:25, the hour hand has moved a bit further. It moves 0.5° per minute (since 30° in 60 minutes), so in 25 minutes, it will move: 25×0.5=12.525 \times 0.5 = 12.5^\circ Therefore, at 3:25, the hour hand will be at: 90+12.5=102.590^\circ + 12.5^\circ = 102.5^\circ

  3. Angle between the hands: Now, the angle between the hour hand (102.5°) and the minute hand (150°) is: 150102.5=47.5|150^\circ - 102.5^\circ| = 47.5^\circ

Thus, the angle between the hour and minute hand at 3:25 is 47.5 degrees.

Would you like further details or have any questions?

Here are five related questions for practice:

  1. What is the angle between the hands at 4:15?
  2. Find the angle at 7:30.
  3. What is the smaller angle between the hands at 6:00?
  4. At what time between 2:00 and 3:00 will the angle between the hands be exactly 90°?
  5. How does the movement of the hour hand affect the calculation?

Tip: Always remember that the clock's hour hand moves gradually between hour marks as the minutes pass!

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Math Problem Analysis

Mathematical Concepts

Geometry
Trigonometry

Formulas

Degree movement per minute for minute hand = 6 degrees
Degree movement per hour for hour hand = 30 degrees
Degree movement per minute for hour hand = 0.5 degrees

Theorems

Angle calculation between clock hands

Suitable Grade Level

Grades 7-9