A tuning fork of frequency 512Hz is used to produce resonance in a resonance-tube experiment. The water levels at first and second resonance are 30.7cm and 63.2cm, respectively. The error in calculating the speed of sound is:
(1) 204.1cm s−1
(2) 110cm s−1
(3) 58cm s−1
(4) 280cm s−1