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Anonymous
A velocity of 1 in per 2 ms equates to :-
1000 in per 2 seconds = 30000 in per minute = 1800000 in per hour.
1 mile = 5280 ft = 12 x 5280 = 63360 inches
1800000 iph = 1800000/63360 mph = 28.41 mph (2dp)
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