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Find the fundamental frequency and the frequency of the third overtone of a pipe 45 cm long. If the pipe is open at both ends (use `V=344m//s`)

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General formula for organ pipe open at both ends is `f_(n+q)=(n+1)(V)/(2l)`
Fundamental frequency, `f_(0+1)=(0+1)(V)/(2l)`
`=(344)/(2xx45)xx100`
`=(344xx100)/(90)`
`=(3440)/(9)=382.2Hz`
Frequency of third overtone, `f'=4f=4xx382.2=1528.8Hz`.
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