Reply to "Marathon Measurement Plan"

jimgerweckMember

Unless you've got a decimal foot tape, it's very hard to locate 3.10686 miles, whereas 1609.344 is easily locatable on a metric tape.

But the real reason should be that the mile is defined by an exact metric distance, but the converse is not true - Imperial equivalents are just approximations - maybe sufficiently accurate for our purposes, but why introduce another possible source of error that's not needed? For instance, if I convert 5km I get 3.106856 miles. But then if I convert that figure back, I get 5.0000001 km, indicating there's some imprecision creeping in here.

11/21/078:04 PM

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