Assertion :Two successive frequencies of an organ pipe are 450 Hz and 750 Hz. Then this pipe is a closed pipe. Reason: Fundamental frequency of this pipe is 150 Hz.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
if we take LCF of both frequencies we will notice the common multiple to be 150 which is fundamental frequency and when multiple by 3 we get 450 and 750 when multiplied by 5 hence it is clearly closed pipe.

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