In a resonance column experiment the first resonance is obtained when the level of the water in tub is 20cm from the open end. Resonance will also be obtained when the water level is at a distance of .

40cm from the open end

40cm from the open end

100%

60cm from the open end

60cm from the open end

0%

80cm from the open end

80cm from the open end

0%

90cm from the open end

90cm from the open end

0%