Question

A source of sound is moving away from a stationary observer with constant velocity 40 m/s. Find frequency heard by observer, if original frequency of source is 400 Hz and speed of sound in air is 360 m/s

• A. 330 Hz
• B. 320 Hz
• C. 360 Hz
• D. 280 Hz

Answer 1

Answer: (C)

360 Hz

Answer 2

The correct answer is option (C) : 360 Hz

$f=400(\frac{360}{360+40})=360Hz$