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(D) Let $d$ be the distance between the man and the reflecting surface.For an echo to be heard,the sound must travel to the reflecting surface and bac

Vedclass · Accepted Answer

$170$

Vedclass · Answer

(D) Let $d$ be the distance between the man and the reflecting surface.For an echo to be heard,the sound must travel to the reflecting surface and back to the observer.Therefore,the total distance traveled by the sound is $2d$.Using the formula $2d = v 	imes t$,where $v = 340 \, m/s$ and $t = 1 \, s$:$2d = 340 	imes 1$$2d = 340$$d = \frac{340}{2} = 170 \, m$.Thus,the distance between the man and the reflection point is $170 \, m$.

$A$ man standing on a cliff claps his hands and hears the echo after $1 \, s$. If the sound is reflected from another mountain and the velocity of sound in air is $340 \, m/s$,then the distance between the man and the reflection point is ..... $m$.

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