Question

please give me right answer with explain please

Answer 1

Answer:

waves produce by the source = 50

                                          time = 10 sec

hence,

frequency = $\frac{no. of waves}{time}$

                 = $\frac{50}{10}$

                 = 5Hz

so, option (D) is correct

Answer 2

i think its frequency is 5hz . hope you understand.