Question

answer this asap. please fast

Answer 1

Answer:

175.5m away is the rock which is reflecting her voice

Explanation:

Given,

time taken = 1/2 s

and speed of sound = 343m/s

A.T.O.

=343/2

=175.5 m

Answer 2

As we know that in case of echo we have speed I.e. 2d/t.where

d is distance and t is the time.

so, A.T.Q.

=) 343 = (2d)/(1/2)

=) 343 = 2d × 2

=) 343 = 4d

=) d = 343 / 4

=) d = 85.75 m

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