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Q:

What is the principle of life jacket?

  • 1
    It provide oxygen to the drowning person.
  • 2
    It increase persons volume to help him float.
  • 3
    It decreases persons volume to help him float.
  • 4
    A persons can sit on it
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Answer : 2. "It increase persons volume to help him float."

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GK General Science Questions

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