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Anonymous
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That's an average speed of 34 mph
9 mm * 9 mm = 81 mm2 = 0.81 cm2
It is: 9 kmph
1 mm is the thickness of a dime. 1cm is 10 mm
1 cm = 10 mm 2 cm = 20 mm 3 cm = 30 mm . . 9 cm = 90 mm That's more than 77 mm.