Question

A car P travelling at 20 $ms^{–1}$ sounds its horn at a frequency of 400 Hz. Another car Q is travelling being the first car in the same direction with a velocity 40 $ms^{–1}$ . The frequency heard by the passenger of the car Q is approximately [Take, velocity of sound = 360 $ms^{–1}$ ]

• A. 485 Hz
• B. 421 Hz
• C. 471 Hz
• D. 514 Hz

Answer 1

Answer: (B)

421 Hz

Answer 2

The Correct Option is (B):421 Hz