A boy hears an echo of his own voice from a distant hill after s .The speed of sound is 340 m /s . What is the distance of the hill from the boy.
JunaidMirza:
After how many seconds?
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Given :
Speed of sound= 340 m/s
Here time is not given
I am assuming as t=1 sec
distance=d?
as it is echo:
Formula
speed= 2x distance/ time
distance= speed x time/2
=340x1/2
d= 170 m
If the time is other value, above procedure can be followed
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