Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be
Text Solution
Verified by ExpertsThe correct answer is:
B
$n' = n \left(\frac{v - v_o}{v + v_s}\right) = 750 \left(\frac{330 - 180 \times \frac{5}{18}}{330 + 108 \times \frac{5}{18}}\right) = 625 \text{Hz}$
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A tuning fork vibrating with a sonometer having 20 cm wire produces 5 beats per second. The beat fr…
A stretched string of length l fixed at both ends can sustain stationary waves of wavelength given…
A string of 7 m length has a mass of 0.035 kg. If tension in the string is 60.5 N, then speed of a …
Two wires are in unison. If the tension in one of the wires is increased by 2%, 5 beats are produce…
A source of sound is travelling towards a stationary observer. The frequency of sound heard by the …
<p>The difference between the apparent frequency of a source of sound as perceived by an observer d…