A bit of trouble on SHM (1 Viewer)

[bleakarcher]

Why is the period taken to be 12.5 hours?

 

[nightweaver066]

6 hours 15 minutes for the tide to move from low to high.

6 hours 15 minutes for the tide to move back from high to low.

1 period = 6hrs 15 mins times 2 = 12 hrs 30 mins or 12.5 hrs.

 

[bleakarcher]

omg, I cant believe I didnt realise that. thanks nightweaver

 

[OzKo]

From what I can gather, the time between low tide and high tide is 6.25 hours (0330 - 0945) so to complete the cycle it would take 12.5 hours.

Correct me if I'm wrong anyone.

Edit: Already solved.