Waves `y_(1) = Acos(0.5pix - 100pit)` and `y_(2)=Acos(0.46pix - 92pit)` are travelling along x-axis. (Here `x` is in `m` and `t` is in second)
(2) The wave velocity of louder sound is

Options

A. 100m/s
B. 192m/s
C. 200m/s
D. 96m/s

Answer

C

Explanation

Speed of wave ,`v=(omega)/k`
`v=(100pi)/(0.5pi) or (92pi)/(0.46 pi)=200 m//s`