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The pressure wave, P = 0.01 sin [1000t – 3x] Nm –2 , corresponds to the sound produced by vibrating blade on a day when atmospheric temperature is 0ºC. On some other day when temperature is T, the speed of sound produced by the same blade and at the same frequency is found to be 336 ms –1 / Approximate value of T is -

1. 4ºC
2. 12ºC
3. 11ºC
4. 15ºC

Correct answer: 4ºC

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