Question

Sound travels about 750 miles per hour. If you stand in a canyon and sound a horn, you will hear an echo.Suppose it takes about 4 seconds to hear the echo. How far away is the canyon wall, in feet? (Hint: the distance to the canyon wall is half the distance the sound travels)

Answer 1

Answer:

The answer to your question is:         d = 0.417 mi

Explanation:

Data

Speed of sound = 750 mi/h

time = 4 seconds

distance = ?

Formula

               s = d / t

time = 2 seconds because in 2 seconds the sounds goes goes from me to the canyon and in two seconds it comes back.

Convert 2s to hours

                             3600 s ------------------- 1 h

                                    2 s  ------------------  x

                                   x = (2 x 1)/3600

                                   x = 0.00056 h

Substitution

                         d = v x t

                         d = 750 mi/h x 0.00056 h

                        d = 0.417 mi