Time from 8am of a particular day to 1pm on the following day =29h. Now, the clock gains 10min in 24 h, it. means that 24h10min of this clock is equal to 24h of the correct clock. ‌
145
6
h of this clock =24h of the correct clock 24h of this clock =‌
24
145
×6×29 =28h,48min of the correct clock 24h of this clock =28h48min of the correct clock. It means that the clock in question is 12 min faster than the correct clock. Therefore, when clock indicates 1pm the correct time will be 48 min past 12.