Question 30
A watch gains 7 seconds in 4 minutes and is correctly set at 10:00 AM. What time will it show at 11:00 PM on the same day?
Solution
It is given that the watch gains 7 seconds in 4 minutes => 105 seconds in 60 minutes (1hr). From 10:00 AM to 11:00 PM on the same day, the time is 13 hours.
In 13 hours, the watch will gain (105*13) = 1365 seconds => 22 minutes 45 seconds. Therefore, the watch will show 11:22:45 PM
The correct option is B.
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