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1 November, 01:30

a boy hears the echo of his own voice from a distance hill after 0.8 seconds. If the speed of sound in air is 340m/s, calculate the distance of the hill from the boy.

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Answers (2)
  1. 1 November, 03:48
    0
    the distance is going be 136 since velocity of sound waves = to 2 * the distance (meter) all time taken (in second)
  2. 1 November, 03:51
    0
    The required distance = 340 * 0.8 m.

    = 272m

    Explanation:

    So the only thing you need here is:

    distance = speed * time

    So the speed of the wave here is 340m/s.

    Time taken = 0.8s

    So, By using the speed-distance formula here,

    The required distance = 340 * 0.8 m.

    = 272m.
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