The driver of a bus... | SOUND WAVE

JEE MAIN 2020

04.09.21_S2

Question

The driver of a bus approaching a big wall notices that the frequency of his bus's horn changes from 420 Hz to 490 Hz when he hears it after it gets reflected from the wall. Find the speed of the bus if speed of the sound is $330 \mathrm{~ms}-1$

Select the correct option:

$61 \mathrm{kmh}^{-1}$

$91 \mathrm{kmh}^{-1}$

$81 \mathrm{kmh}^{-1}$

$71 \mathrm{kmh}^{-1}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Physics

Medium

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