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The length of the closed pipe whose fund...

The length of the closed pipe whose fundamental frequency is equal to yhat of open pipe of 60cm, length is

A

20 cm

B

24 cm

C

28 cm

D

30 cm

Text Solution

Verified by Experts

The correct Answer is:
D
Fundamental frequency of closed pipe `n_1=V/(4l_1)`
Fundamental frequency of open pipe `n_1=V/(2l_1)`
since ,`n_1=n_2` and `l_2=60cm`
`impliesV/(4l_1)=V/(2l_2)`
`:. l_1=(2xx60)/4=30cm`
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