A clock gains 12 minutes every 24 hours. It is set right at 6 a.m. on Monday. What is the true time when it shows 12:15 p.m. on Tuesday?
Correct answer A. 12 noon on Tuesday
Explanation
Clock time elapsed = 30 h 15 min = 1815 minutes. It shows 1452 minutes per 1440 true minutes, so true time = 1815 × 1440/1452 = 1800 minutes = 30 hours, giving 12 noon on Tuesday.
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