Solution: Because 1 hour =60 minutes, 1 day =24 hours. ?

Then according to the 24-hour clock, 10 pm is 22 o'clock.

6 am =6 am。

So working hours =24 hours -22 hours +6 hours.

=8 hours =8 hours.

That is, a * * * worked for 8 hours.

Extended data:

1 and the characteristics of the 24-hour system

(1) will not confuse the time in the morning with the time in the afternoon. In a calendar or similar document, you can tell at a glance whether it is morning or afternoon.

(2) can accurately describe the time of a day.

2, the characteristics of the twelve-hour system

(1) The twelve-hour clock divides the day into morning and afternoon.

(2) The morning session is from midnight to noon, and the afternoon session is from noon to midnight.

Baidu encyclopedia -24-hour system