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January 27, 2015

January 27, 2015

Posted by **tish** on Tuesday, March 15, 2011 at 7:45pm.

- math -
**MathMate**, Tuesday, March 15, 2011 at 8:13pmWhile 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.

- math -
**Anonymous**, Monday, November 26, 2012 at 1:05pm50 cm X 75 cm

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