Posted by Aravind on Wednesday, February 23, 2011 at 11:44am.
N = 44,000 m/(2*pi*0.07 m)
= 100,000 (rounded to 4 sig. figures)
C = pi * d
C = 3.14 * 14
C = 43.96 cm = 0.4396 meters
1 km = 1000 m
Take it from there.
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