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 :

dsuc.created: 7 years ago | dsuc.updated: 4 years ago

dsuc.updated: 4 years ago

1:10pm

12:55pm

1:05pm

1:08pm

12:50pm

Bangladesh Bank Bangladesh Bank - Assistant Director - 2013 গণিত ঘড়ি (Watch)

dsuc.explanation

969

common.best_ans:

The time difference = 1pm - 7 pm = 6 hour = 360 minutes

3 minute gains from 5 second

1 minute gains from 5/3 second

360 minute gains from (5×360)/3 second = 600 second = 10 minute

So, at 1 PM, the watch will indicate = 1PM + 10 minute = 1 : 10 PM

7 years ago

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Md Azizur Rahman

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গণিত

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