The coil
How many ropes (the diameter of 8 mm) fit on the coil (threads are wrapped close together)? The coil has dimensions:
The inner diameter is 400mm.
The outside diameter is 800mm.
The length of the coil is 470mm.
The inner diameter is 400mm.
The outside diameter is 800mm.
The length of the coil is 470mm.
Correct answer:
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