Question

a man stands at a distance of 280.5m from a cliff. he fires a gun and hear the Echo after 1.65 seconds.what will be the speed of the sound?
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Answer 1

Answer:

340 m/s

Explanation:

Given :

• Distance of the man from the cliff = 280.5 metres

• Time taken to hear the echo = 1.65 seconds

To find :

• Speed of the sound

Distance of the sound will be double the distance between man and cliff as the sound has to go and come back

Distance = 2×280.5

Distance = 561 metres

Time taken = 1.65 seconds

Speed = distance / time

Speed = 561/1.65

Speed = 340 m/s

The speed of the sound in the above case is equal to 340 m/s

Answer 2

$\bf{\red{\bigstar}}$ AnsweR :

Given distance , d = 280.5 m

Now the sound has to come back from cliff after firing the gun.

So , distance , d = 2(d)

⇒ d = 2(280.5)

⇒ d = 561 m

Given , Time , t = 1.65 sec

Now , $\bold{\bf{\red{Speed=\frac{Distance}{Time} }}}$

⇒ Speed , S = 561/1.65

⇒ Speed , S = 340 m/s

So , speed of the sound is equals to the 340 m/s.