Difficulty: Easy
Correct Answer: 67.5°
Explanation:
Problem restatementCompute the smaller angle between the hands at 5:15.
Given data
Concept/ApproachUse angle = |(30H + 0.5M) − 6M| = |30H − 5.5M|.
Step-by-step calculation Angle = |30×5 − 5.5×15| = |150 − 82.5| = 67.5°
Verification/AlternativeHour hand at 5:15 is 150° + 7.5° = 157.5°. Minute hand is 15×6° = 90°. Difference = 67.5°.
Final Answer67.5°
Discussion & Comments