Equation of the progressive wave is given by : `y=a sin pi (40 t-x)` where a and x are in metre and t in second. The velocity of the wave is

The equation of a progressive wave is given by y = 0.5 sin (20 x - 400 t) where xand y are in metre and tis in second. The velocity of the wave is

The equation of a wave is given by y=a sin (100t-x/10) where x and y are in metre an t in second, the velocity of wave is

The equation of a wave is given by y=a sin (100t-x/10) where x and y are in metre an t in second, the velocity of wave is

The equation of a progressive wave is y =4 sin (4 pi t-0.04 x+pi/3) where x is in metre and t is in second. The velocity of the wave is

The equation of progressive wave is y=a sin (200 t-x) . where x is in meter and t is in second. The velocity of wave is