An air column in a pipe, which is closed at one end will be in resonance with a vibrating tunning fork of frequency 264 Hz, If the length of column is :-

Options

A. `37.25`
B. `62.50`
C. 93.75`
D. 125

Answer

C

Explanation

For closed organ pipe frequency `f=n((V)/(4l))`
Where n = 1, 3, 5, 7 ………..
`rArr l = (nv)/(4f)`
`l = (n xx 330)/(4 xx 264)`
when n = 3
`l = 93.75`