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A man standing 48 m away from a wall fires a gun. Calculate the time after which an echo is heard. (The speed of sound in air is 320m/s).
A man standing 48 m away from a wall fires a gun. Calculate the time after which an echo is heard. (The speed of sound in air is 320m/s).
Class 10 | ICSE | Physics | Selina | Sound
A man standing 48 m away from a wall fires a gun. Calculate the time after which an echo is heard. (The speed of sound in air is 320m/s).

2 D / Time = Velocity

2D / velocity = time after which an echo is heard

= \(\frac{2\times 48}{320}\)

=0.3 seconds

i

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