When will the slower clock show correct time again?
Explanation:
For the clock to show correct time again, the clock needs to lose 12 hours.
The slower clock loses 3 minutes every hour, hence it will lose 12 hours in 12×603×1 = 240 hours = 10 days.
⇒ 10 days after 6 a.m. of 1st January will be 6 a.m. of 11th January.
Hence, option (d).
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