English

To hear an echo, the minimum distance of the obstacle from the source of sound must be ______. -

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Question

To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.

Options

  • 34 m

  • 17 m

  • 340 m

  • 170 m

MCQ
Fill in the Blanks

Solution

To hear an echo, the minimum distance of the obstacle from the source of sound must be 17 m.

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