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A.
7.8 x 10-5
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B.
4.68 x 106
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C.
7,800,000
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D.
4.68 x 108
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E.
7.80 x 105
Correct Answer: Option D
Explanation
1km = 1000m
60sec. = 1 mins
60 mins. = 1 hr
130000m per sec = 130000 x 3600
= 468000000m/hr
= 468 x 108 m/hr
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