At what angle are the hands of a clock inclined at 15 minutes past 5?
Aptitude
Clock
Difficulty: Easy
Choose an option
Answer
Correct Answer: 67.5°
Explanation
Problem restatementCompute the smaller angle between the hands at 5:15.
Given data
- Hour-hand position at time H:M = 30H + 0.5M (degrees from 12).
- Minute-hand position at time H:M = 6M (degrees from 12).
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°