Answer: -
The next low tide occur at 12 noon, because the coastline will turn 90 degrees from the moon.
Explanation: -
Time taken for the earth to rotate = 24 hours.
Each day there are two high tides and low tides.
Thus the duration between two high tides is 12 hours and between 1 high tide and 1 low tide is 6 hours.
Thus the time of next low tide is 6 am + 6 hours = 12 noon.
Now in 24 hours the coastline turns 360 degrees.
In 6 hours it will travel (360 x 6) / 24 =90 degrees.
Thus the next low tide occur at 12 noon, because the coastline will turn 90 degrees from the moon.