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Tuesday, 17 September 2019

Gk in hindi 30 important question answer | Gk in hindi | railway, ssc, m...



Gk in hindi 30 important question answer | Gk in hindi | railway, ssc, mts, chsl, police | gk trick



प्रकाश की चाल का मापन सबसे पहले किसने किया था ?

Who
first measured the speed of light?



(A) आइन्सटीन

(C) रोमर

(B) न्यूटन

(D) गैलीलियो
at

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