Posted by tish on Tuesday, March 15, 2011 at 7:45pm.
While 1cm = 0.39 inch is a good approximation to within 1%, I usually use one inch = 2.54 cm, which is exact!
Using the given conversion factor,
50 cm = 50cm *0.39"/cm = 19.5"
75 cm = 75cm *0.39"/cm = 29.25"
Using the exact value of 1"=2.54cm,
50 cm = 50 / 2.54 = 19.69"
75 cm = 75 / 2.54 = 29.53"
So there is a measurable difference.
50 cm X 75 cm
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