A Boy Fires a Gun and Hears the Echo 2 Seconds Later. If He is 480 M Away from a Wall, Calculate the Velocity of Sound in Air.

A boy fires a gun and hears the echo 2 seconds later. If he is 480 m away from a wall, calculate the velocity of sound in air.

Numerical

Velocity of sound = `"distance travelled"/"time taken" = (2"d")/"t"`

∴ Velocity of sound = `(2 xx 480)/2` = 480 m/s

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Chapter 3 Sound
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