Question

A man stands 80m in front of a cliff face.

He makes aloud bang and listens for the
echo. He makes a loud bong once every second
He hears an echo exactly half way between
the bang that caused it and the next hang
A 40mis
B. 20m/s
C 160mis
D 320m/s​

Answer 1

v = 40 m/s

Step-by-step explanation:

Given that,

A man stands 80m in front of a cliff face. He makes aloud bang and listens for the echo. He makes a loud bong once every second.

He hears an echo exactly half way between the bang that caused it and the next hang.

Distance = 40 m, t = 1 s

The speed of sound is given by :

`v=(d)/(t)\\\\v=(40\ m)/(1\ s)\\\\v=40\ m/s`

Hence, the speed of sound is equal to 40 m/s.