Multiple choice general knowledge science & technology

The duration of lubb and dubb sound respectively

  1. 0.10 sec and 0.16-0.90 sec

  2. 0.16-0.90 sec and 0.10 sec

  3. 0.20 sec and 0.40-0.50 sec

  4. 0.40-0.50 sec and 0.20 sec
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer

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