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Question

The speed of light is 3×108 m/s and the speed of sound is 3.43×102 m/s. Then the speed of light is almost _____ times greater than that of sound.
  1. 1010
  2. 103
  3. 108
  4. 106


Solution

The correct option is D 106
Given:Speed of light=3×108 m/sSpeed of sound=3.43×102 m/sspeed of lightspeed of sound=3×1083.43×102=3×1063.43         [aman = amn]

Therefore, the speed of light is almost 106 times greater than that of sound.

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