Question

A man standing 52 m away from a
wall fires a gun. Calculate the time
after which an echo is heard. (speed
of sound in air = 330 m/s)
1. 0.415 s
2. 0.315 s
3. 0.385 s
4. 1.3 S​

Answer 1

it think your answer is 0.415 s

Answer 2

Answer:

2. 0.315sec

Explanation:

$t = \frac{52 + 52}{330} = 0.315$