question_answer

If the velocity of sound in air is 320 m/s, the maximum and minimum lengths of a closed pipe that would produce a just audible sound are

A) \[2.6\text{ }m\text{ }and\text{ }3.6\times {{10}^{-3}}m\]             

B) \[4\text{ }m\text{ }and\text{ }4.2\times {{10}^{-3}}\text{ }m\]

C) \[3\text{ }m\text{ }and\text{ }3\times {{10}^{-3}}\text{ }m\]

D) \[4\text{ }m\text{ }and\text{ }4\times {{10}^{-3}}\text{ }m.\]