The equation of a stationary wave is y=0.8cos πx20sin200 πt, where x is in cm and t is in sec. The separation between consecutive nodes will be

On comparing the given equation with standard equation y=2a sin2πxλ cos 2πvtλ]We get 2πλ=π20⇒λ=40Separation between two consecutive nodes = λ2=402=20  cm