JEE Mains 05-Sep-2020 Shift 1 Solved Paper

In a resonance tube experiment when the tube is filled with water up to height of 17.0 cm frombottom, it resonates with a given tuning fork. When the water level is raised the nextresonance with the same tuning fork occurs at a height of 24.5 cm. If the velocity of sound in air is 330 m∕s, the tuning fork frequency is: