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Assertion (A): Breaking wave impact on a vertical wall can far exceed the quasi-static pressure.
Reason (R): An impulsive impact of very short duration produces a much higher peak pressure.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the reason gives the mechanism, and the impulse rather than the peak governs the response. A caisson may survive a pressure that would fail a rigid element outright. Duration matters as much as the peak pressure.

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