A person is infront of a vertical mountain fires a bullet and hears its echo after 3sec .the person walks a s distance d towards the mountain then fires another bullet and hears its echo after a time 2sec .if velocity of sound in air is 340me then value of d is ..
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Time =2 sec
speed =346m/s
2d=s×t
2d= 340 ×2
2d=680
d=340m
teerathkour62:
Sorry but in answer key they gave as 170
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