Question

A rifle is fired in the valley formed between two parallel mountains .the echo from one mountain is heard after 1.5s and from the other is heard 3s later .what is the width of the valley (velocity of sound =340ms)

Answer 1

${\huge {\mathfrak {Answer :-}}}$

➡️ Let the distance from the first mountain be x.

So, 2x = 3 * 340

Or, x = 510 .

➡️ Let the distance from the second mountain be y.

So, 2y = 1.5 * 340

Or, y = 255.

➡️ Hence, width of the valley is

= (510 - 255) m

= 255 m.

That's it..