The correct answer is Both A and B are correct. Key Points The speed of sound depends on the properties of the medium through which it travels. The speed of sound in water (sea), the speed of sound is 1531 m/s. So A is correct. The velocity of a sound wave is affected by two properties of Material Type. Speed of Sound (m/s) in brass in 4700 m/s. So B is correct. Additional Information The speed of sound depends on the type and properties of the medium through which it is travelling. The speed of sound in a particular medium depends on the temperature and pressure of that medium. The speed of sound decreases when it passes from the solid to the gaseous state of a given medium. In any medium, if the temperature increases, the speed of sound also increases and vice versa. Speed of sound in different media at 25 ºC State Medium Speed of sound (m/s) Solid