A string instrument produces a wave of frequency 240Hz when the wave speed along the stretched string is 180m/s.
(i) Find the wavelength of the wave on the string in this condition.
(ii) The tension in the string is then increased so that the wave speed rises to 216m/s, but the driving frequency remains the same. Calculate the new wavelength.
(iii) State the percentage change in wavelength produced by this adjustment of tension.