There is a chain nailed to the wall. The chain is 10 feet long and the centre of the chain dips down 5 feet from where each side of the chain is nailed to the wall. How far are the 2 ends of chain from each other?
The ends are touching. In order for the chain to dip down 5 feet (exactly half) the ends must be touching and the chain is effectively folded in half.
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