Nguyễn Việt Hoàng 10/03/2017 at 17:27
The circumference of that wheel is:
650 x 3.14 = 2041 (mm) = 0.002041 km.
The wheel roll number to go all the way is:
2,041: 0.002041 = 1000 (round)
Answer: 1000 rounds.
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