Dear student,

If the person standing near a railway line hears two distinct sounds of a train, then the sounds are - one travelling through steel and the another travelling through air.

Let the distance of train be d from the person.
speed of sound in air = 340 m/s
speed of sound in steel = $340×16=5440m/s$
time taken by sound travelling through steel to reach the person =
time taken by sound travelling through air to reach the person =

$time=\frac{dis\mathrm{tan}ce}{speed}\phantom{\rule{0ex}{0ex}}{t}_{s}=\frac{d}{5440}\phantom{\rule{0ex}{0ex}}{t}_{a}=\frac{d}{340}$

given that

Distance of train is 725m

​Kindly post other questions in separate thread.

Regards

• 0
What are you looking for?