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Q.

What is the base frequency if a pipe gives notes of frequencies 425, 255 and 595 and decide whether it is closed at one end or open at both ends?

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a

17, closed

b

85, closed

c

17, open

d

85, open

answer is B.

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Detailed Solution

Let the base frequency be n for closed pipe then notes are n,3n,5n ...∴ Note 3n = 255 ⇒ n = 85, Note 5n = 85×5 = 425 Note 7n = 7×85 = 595
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