Question

A mountaineer shouts her name in the valley. Half a second later she hears the echo. How far is the rock which is reflecting her voice

Answer 1

Answer:

T=0.5/2=0.75

distance from only one way

=s=distance/time

=s=343×0.75

s=275.25

(approximately 300m away the voice will reach).

Explanation:

hope it helps u!

Answer 2

$\huge\fbox{\underline{\underline\blue{Answer}°}}$

85.75 Ans.

$\bold\red{Solution}:-$

Speed of sound in air = 343 m/s

Time = $\frac{1}{2}sec = 0.5sec$

The time given is total time of the sound to hit the rock and return back , but we have to find the time the sound take to travel in one direction .

So,

Time (t) = $\frac{0.5}{2}sec = 0.25sec$

$speed = \frac{distance}{time}$

Distance = Speed x Time

⠀⠀⠀⠀ ⠀⠀= 343 x 0.25m

⠀⠀⠀⠀ ⠀⠀= 85 75m Ans.