Daily tidal cycle recurs after

12.4 hrs

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8 hrs

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10.4 hrs

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12 hrs

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Solution

The correct option is C 12.4 hrs
A tidal cycle is one high tide plus a successive low tide. On an average, there 2 high tides and 2 low tides in a day. More accurately, 2 high and 2 low tides recur every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. Hence, daily tidal cycle recurs after 12.4 hours. If the 2 high and 2 low tides are of same height, the pattern is called a semidiurnal tide. If the high and low tides differ in height, the pattern is called a mixed semidiurnal tide.
Thus, the correct answer is '12.4 hours.'

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