Question

trackman strike rail track with hammer of freq 2.50 hz . other trackman listen sound at 1 km away . cal. time taken to hear the sound.
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Answer 1

Given that,

Frequency of hammer = 2.50 Hz

Distance = 1 km

We know that,

The speed of sound is 343 m/s.

We need to calculate the time taken to hear the sound

Using formula of speed

$v =\dfrac{d}{t}$

$t = \dfrac{d}{v}$

Where, v = speed of sound

d= distance

t = time

Put the value into the formula

$t = \dfrac{1000}{343}$

$t=2.9\ sec$

Hence, The time taken to hear the sound is 2.9 sec.