Question

What is an echo? An echo returned in 4 s. What is the distance of the reflecting surface from

the source, given that the speed of sound is 320m s−1 ?​

Answer 1

Explanation:

echo is a sound which gets reflected when it hit a plane surface during echo we hear two sounds one the original and other which is echoed when it hits a surface. the distance will be 4 × 16 = 64

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