Answers

2016-02-25T20:54:11+05:30
Speed,v =d/t
              = lambda/t
lamda is the wavelength of the sound wave.it is the distance travelled by the sound wave in one time period(t).thus
        v=lamda*new(v)
(1/t=new)
or   v=lambda*new
 speed=wavelength*frequency

2 3 2
it's correct
plzzzz mark as brainliest answer