Answers

2015-05-13T17:51:25+05:30
we know that,in the case of echo, 2d =v*t

 [ where d=distance between reflecting surface and source, v=velocity,
   t=
tot.time taken ]                                                                                                                
here,t = 3s
       v = 342 m/s
hence 2d = 342*3 = 1026 m
thus, d = 1026/2= 513 m

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  • Brainly User
2015-05-13T18:02:46+05:30
Time = 3 second 
v = 342 m /s 
s=v×t
s=342×3
s=1026 
we have to find the distance so total distance cover =
s+s = 1026 
2s=1026 
s=513 m 
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