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Question
A watch which gains 5 seconds in 3 minutes was set right at 7am . In the afternoon of the same day when the true time is 1 pm, the watch will indicate :
1:10pm
12:55pm
1:05pm
1:08pm
12:50pm
ANSWER : 1
Descrption
<p>The time difference = 1pm - 7 pm = 6 hour = 360 minutes</p> <p>3 minute gains from 5 second</p> <p>1 minute gains from 5/3 second</p> <p>360 minute gains from (5×360)/3 second = 600 second = 10 minute</p> <p>So, at 1 PM, the watch will indicate = 1PM + 10 minute = 1 : 10 PM</p>
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