Echo Minimum Distance โ Class 8 Science Formula | MscTutor
Formula deep page
Echo Minimum Distance
Minimum distance = (Speed of sound ร 0.1s) / 2 = 17.15 m
This formula belongs to the chapter "Sound" in Class 8 Science. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
Identify the quantity you need to find.
Check the related variables and units from the question.
Substitute values carefully into the formula.
Simplify step by step and write the final statement.
Worked cue
Shout at wall 20m away: echo comes in 20ร2/340 = 0.12s (heard as echo)
Rule note: Human ear cannot distinguish sounds less than 0.1s apart
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