7.8 x 10-5
4.68 x 106
7,800,000
4.68 x 108
7.80 x 105
Correct answer is D
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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