Home JEE Main - Previous Year Papers JEE MAIN 2021 PAPER -11 A car is moving towards a stationary wall ma…
JEE Main - Previous Year Papers JEE MAIN 2021 PAPER -11 Single Correct MCQ
Published on: August 14, 2026

A car is moving towards a stationary wall making Horn of frequency . The Reflected frequency heard by driver of car is . Find speed of car [ speed of sound]

A
B
C
D

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The correct answer is:
C

be the frequency heard at wall.

Then this reflected back and the frequency heard by the driver is

From equation (1) and (2)

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