CHAPTER No: 8 (waves)

The wave speed is given by:-

A>V = Tl
B>V = T / l
C>V = f / l
D>V = f l
If 20 waves passes through the medium in 1 second with speed of 20 ms-1 then wavelength is:-

A>400m
B>2m
C>20m
D>1m