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(C) Given: Distance of the wall $(D)$ = $55 \, m$. Speed of sound $(V)$ = $330 \, m s^{-1}$.For an echo to be heard,the sound must travel to the wall

Vedclass · Accepted Answer

$0.3$

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(C) Given: Distance of the wall $(D)$ = $55 \, m$. Speed of sound $(V)$ = $330 \, m s^{-1}$.For an echo to be heard,the sound must travel to the wall and back to the person,covering a total distance of $2D$.Using the formula: $2D = V 	imes t$.Substituting the values: $2 	imes 55 = 330 	imes t$.$110 = 330 	imes t$.$t = 110 / 330 = 1 / 3 \, s \approx 0.33 \, s$.Rounding to the nearest provided option,the time taken is $0.3 \, s$.

$A$ person fires a gun standing at a distance of $55 \, m$ from a wall. If the speed of sound is $330 \, m s^{-1}$,find the time taken for an echo to be heard. (in $s$)

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