URGENT HELP PLEASE (c) Measurement of waves at the beach one day shows that the velocity (speed) of the waves is 3 m/s and the distance between wave peaks is 20 m. What are the frequency and wave period for these waves? Show your working:

f waves at the beach one day shows that the velocity (speed) of the waves is 3 m/s and the distance between wave peaks is 20 m. What are the frequency and wavef waves at the beach one day shows that the velocity (speed) of the waves is 3 m/s and the distance between wave peaks is 20 m. What are the frequency and wave period ff waves at the beach one day shows that the velocity (speed) of the waves is 3 m/s and the distance between wave peaks is 20 m. What are the frequency and wave period ff waves at the beach one day shows that the velocity (speed) of the waves is 3 m/s and the distance between wave peaks is 20 m. What are the frequency and wave period f period f

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be