Answer:
1.67m 
5m/s
Explanation:
Given parameters: 
Wavelength of the wave = 3m
Speed of the wave  = 5m/s 
Unknown: 
Frequency of the wave  = ? 
Speed of the water waves  = ? 
Solution: 
The distance between crest and the adjacent trough of water waves is known as the wavelength of a wave. 
   To find the frequency ; 
          V = f∧ 
 V is the speed of the wave 
 f is the frequency
 ∧ is the wavelength
    Insert the parameters and find the frequency; 
          f  = V/ ∧   = 5 / 3  = 1.67Hz
The rate at which the wave passed a given point is the speed of the wave and it is 5m/s
 
        
             
        
        
        
In order to solve this problem all you have to do is multiply 15 by 3.5 which equals 52.5
So the answer is D. 52.5 miles!