The speed of a wave in medium is `760 ms^(-1)`. If 3600 waves cross a point in the medium in 2 minutes, then the wavelength of the wave is :

Options

A. `25.8 m`
B. `14.75 m`
C. `25.3 M`
D. `50.6 M`

Answer

C

Explanation

Speed `v=760 ms^(-1)`
Number of waves `=3600`
Time taken `t=2xx60` "second
Frequency `n=(3600)/(t)=(3600)/(2xx60)=30`
`v= n lambda`
Wavelength `lambda=(v)/(n)=(760)/(30)=25.6 m`