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October 20, 2014

October 20, 2014

Posted by **Vince** on Saturday, August 23, 2008 at 9:09pm.

- Math! -
**Reiny**, Saturday, August 23, 2008 at 10:54pmI assume you are looking for the value of R

Original rectangle has area 15x12 or 180 cm^2

new length = 15-R

new width = 12+R

so 180 - (15-R)(12+R) = 4

solve for R

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