16.If H is the height of the wave expected, then the height of the breakwater is generally taken as

17.The significant wave height is defined is the average height of the

18.Assertion A : Marine structures are made specially bulky and strong. Reason R : Sea insects result in undermining of the hardest and the soundest building material. Select your answer based on the coding system given below:

19.As per Berlin's formula, the length of wave in metres is given by

20.If Hs is the significant wave height, then the average wave height and highest wave height respectively are given by