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Q: In ...... speed of sound is the fastest.
  • A. water
  • B. kerosene oil
  • C. steel
  • D. air
Correct Answer: Option C - The speed of sound is highest in solid, and lowest in the gas. Since steel is solid, the velocity of sound in steel will be the highest. The velocity of sound in steel is about 6420 m/s.
C. The speed of sound is highest in solid, and lowest in the gas. Since steel is solid, the velocity of sound in steel will be the highest. The velocity of sound in steel is about 6420 m/s.

Explanations:

The speed of sound is highest in solid, and lowest in the gas. Since steel is solid, the velocity of sound in steel will be the highest. The velocity of sound in steel is about 6420 m/s.