A watch which gains 5 seconds every 3 minutes was set right at 9 a.m. What is the true time when the watch shows 6:15 p.m. that evening?
Answer) Time from 9 a.m. to 6:15 p.m. = 9 hours 15 minutes = 555 minutes
3 minutes 5 seconds of this clock = 3 minutes of correct clock
185 seconds of this clock = 180 seconds of correct clock
1 minute of this clock = (180/185) minutes of correct clock
555 minutes of this clock = (180/185)*555 = 540 minutes = 9 hours of correct clock
Correct time is 6 p.m.
1 minute of this clock = (180/185) minutes of correct clock
555 minutes of this clock = (180/185)*555 = 540 minutes = 9 hours of correct clock
Correct time is 6 p.m.
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