Question

While standing on the edge of the grand canyon, you see a rattlesnake and scream. You hear the echo of the scream off canyon floor 11.2 seconds later. How deep is the canyon?

Answer 1

Answer:

1904 m

Explanation:

$\pink{\frak{Given}}\begin{cases} \textsf{ You scream after seeing a rattle snake .}\\\textsf{Scream is heard after 11.2 s .} \end{cases}$

Here we need to find out the depth of the canyon . When you will scream after seeing a snake , the sound produced will travel till the end of the canyon and after hitting the end , it will travel back to you .

• So if the depth of the canyon is d (say) , then the total distance travelled by the sound wave will be d + d = 2d .

And we know that the speed of the sound is approximately 340m/s in air , so we can use the formula distance = speed * time to calculate the depth of the canyon . So ,

$\sf \longrightarrow Distance = (Speed)(Time)$

$\sf \longrightarrow 2d = 340m/s * 11.2 s$

$\sf \longrightarrow d = \dfrac{340m/s * 11.2s}{2}$

$\sf \longrightarrow \boxed{\bf Depth_{canyon}= 1904m }$