The clock is set correctly at 10 am. The real time that passes from 10 am to 7 pm is 9 hours.
The clock gains 8 minutes in 24 hours.
The minutes gained in 9 hours:
Minutes gained=248×9
=31×9
=3 minutes
When the real time is 7:00 pm, the faulty clock has run 3 minutes extra.
The clock will show:
7:00 pm+3 minutes=7:03 pm
Therefore, the clock will show 7:03 pm.