Can I have detailed answers? Please and thank you.

6 hours at 12 o'clock. Really, how more detailed can that get anyway?

The hands will first be aligned just before 6:33. Here's how to calculate:

The distance that the minute hand travels in x minutes is x/60 of a rotation. In that same time the hour hand moves x/(12*60) of a full rotation. Since the hour hand starts a half rotation ahead, they align when:

Hour hand = Minute hand
1/2 + x/(12*60) = x/60.

Solve for x, and you'll find it's 32 minutes plus a bit, so convert that extra bit to seconds.