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A faulty wall clock is known to gain 15 minutes every 24 hours. It is synchronized to the correct time at 9 AM on 11th July. What will be the correct time to the nearest minute when the clock shows 2 PM on 15th July of the same year?
- 12:45 PM
- 12:58 PM
- 1:00 PM
- 2:00 PM
Correct answer: 12:58 PM
Solution
The faulty clock gains 15 minutes every 24 hours, which means in the 4 days from 9 AM on July 11 to 2 PM on July 15, it gains a total of 1 hour (15 minutes x 4). Therefore, when the faulty clock shows 2 PM, the actual time is 1 hour earlier, resulting in 12:58 PM.
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