Question

Aditi clapped her hands near a cliff and heard the echo after 4 seconds. What is the distance of the cliff her if the speed of sound is taken as 346 ms^-1 .

Answer 1

Given 

Speed of sound (u) = 346 m/s 

Time taken for hearing the echo (t) = 4s 

Now

speed = \(\frac{distance}{time}\)

⇒ 346 = \(\frac{distance}{4}\)

⇒ Distance travelled by the sound = 346 ×4 = 1384 m.

In 4 s, sound has to travel twice the distance between the cliff and aditi. Therefore, the distance between the cliff and aditi is =\(\frac{1384}{2}\) = 692 m

Distance of cliff from aditi = 692 m.