Traditional Culture Encyclopedia - Traditional stories - Knotting and blanking length of rubber band
Knotting and blanking length of rubber band
The rubber band is knotted and the blanking length is 26cm.
Mark the rubber band with a ballpoint pen and cut 26cm.
The rubber band can be regarded as an approximate circle with a diameter of 3× 5 = 15cm and a circumference of π×15 = 3.14×15 = 47.1cm.
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