Rohit has a watch that gains 5 seconds in 3 minutes. It was set right at 9 a.m. in the morning. In the afternoon of the same day, when the watch indicated 4 o'clock, how much time will the watch have gained?

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Rohit has a watch that gains 5 seconds in 3 minutes. It was set right at 9 a.m. in the morning. In the afternoon of the same day, when the watch indicated 4 o'clock, how much time will the watch have gained?

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