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A clock which gains 5 seconds in 3 minutes is set right on 7 am. Then what will be the true time when clock indicates 4:15 pm on the same day?
1. 4 pm
2. 5 pm
3. 2 pm
4. 3 pm
5. None

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Correct Answer - Option 1 : 4 pm

Time from 7 am to 4:15 pm = 9 hours 15 minutes = 555 minutes.

Now, 37/12 min of this watch = 3 min of correct clock.

555 minutes of this watch = {(3 × 12 × 555)/37} ÷ 60 = 9 hours of the correct clock.

Correct time is 9 hours after 7 am i.e. 4 pm.

Hence, the correct time will be 4 pm.

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