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The fundamental frequency of a closes or...

The fundamental frequency of a closes organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of the organ pipe open at both the ends is …….. .

A

80 cm

B

100 cm

C

120 cm

D

140 cm

Text Solution

Verified by Experts

The correct Answer is:
C
`(v)/(4 L_("closed")) = (3v)/(2 L_("open")) implies L_("open") = 6 L_("closed") = 120 ` cm
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