question_answer

\[y=3\,\sin \pi \left( \frac{t}{2}-\frac{x}{4} \right)\] represents an equation of a progressive wave, where\[t\]is in second and \[x\] is in metre. The distance travelled by the wave in 5 s is

A)  8 m  

B)                                         10 m

C)  5m                        

D)         32 m