Asked by Anonymous

A piece of string is wound tightly around a cylinder for 20 complete turns. The length of the string is found to be 3.96cm. calculate the diameter of the cylinder in cm
Answered by Reiny
1 turn would be 3.96/20 cm = .195 cm
so πd = .195 , where d is the diameter
d = .195/π = ...

wow, that's some tiny cylinder
Answered by Chelsea
6.3
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