Corresponding to given observation calculate speed of sound. Frequency of tuning fork = 340 Hz

Mean length from the water level in first resonance isl1=23.9+24.12=24.0 cmSimilarly, mean length from the water level in second resonance isl2=73.9+74.12=74.0 cmSpeed of sound,v=2fl2-l1=2×340(0.740-0.240)=380 m/s