The frequency of a wave travelling at a speed of 500 \[m{{s}^{-1}}\] is 25Hz. Its time period is

The frequency of a wave travelling at a speed of 500 \[m{{s}^{-1}}\] i

1.	The frequency of a wave travelling at a speed of 500 \[m{{s}^{-1}}\] is 25Hz. Its time period is
A.	20s
B.	0.05s
C.	25s
D.	0.04s
Answer» E.