An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocit…

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Question From – Cengage BM Sharma WAVES AND THERMODYNAMICS SOUND WAVES AND DOPPLER EFFECT JEE Main, JEE Advanced, NEET, KVPY, AIIMS, CBSE, RBSE, UP, MP, BIHAR BOARD

QUESTION TEXT:-
An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?
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