Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Physics Optics

Speed of light is about _______.

1

3,00,000 m/s

2

300,000 km/s

3

30,00,000 m/s

4

More than one of the above

5

None of the above

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