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Pratyksh Gupta from Central Academy Senior secondary , Beawar
Subject :NSO    Class : Class 9
What is the speed of light

Ans 1:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
3 *10*10*10*10*10*10*10*10 m/sec

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