Two waves of wavelength 40 cm and 42 cm produce 15 beats s^ -1 . The velocity of sound will be

MHT CET Physics question

Two waves of wavelength 40 cm and 42 cm produce 15 beats . The velocity of sound will be

Answer: (C)

gives \frac{15×0.40×0.42}{0.02}$=126\

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Question ID VK-070311