Answers

2016-03-16T19:34:11+05:30
Air is the medium where echo can hear easily.
echo is heard as the reflectedsound gets merged with the original sound. ... A large building, a mountain side, large rockformation etc. are good reflectors of sound for producing an echo... Thus echo can be heard fast..
0
if this answer helped you please mark this as brainliest
2016-03-16T19:52:07+05:30
Air is where we can hear it clearly bcuz speed of sound is higher here
0