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A sound travels down a hallway that is 115 m long. Then it echoes and returns back to the source. If the speed of sound is 350 m/s, how long does it take in seconds) to hear the echo?
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A sound travels down a hallway that is 115 m long. Then it echoes and

returns back to the source. If the speed of sound is 350 m/s, how long
does it take in seconds) to hear the echo?

User Infamy
by
3.1k points

1 Answer

9 votes

Answer:

0.66 s

Step-by-step explanation:

∆x = v∆t → 2 × 115 = 350 ∆t → ∆t = 230/350 = 0.66 s

User Andrei Chis
by
3.5k points
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