Do question 3and 6 in a page

Dear student,
3. Given, λ = 100 m
v = 20 m/s
Since, v = f ​λ 
f = v/​λ =  20/100 = 0.2 hertz

6. The speed of the sound, distance traveled and the time taken relationship is given as follows.
Speed of sound=Time taken / Distance traveled​

Time = distance velocity time = 1650330=5 sso B will hear the sound after 5 seconds.


Regards

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