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January 31, 2015

January 31, 2015

Posted by **dianalish`** on Thursday, April 28, 2011 at 5:25pm.

- math -
**Henry**, Friday, April 29, 2011 at 10:48pmThere are 6 surface areas, but we need

to calculate only 3 because:

The Front and Back are equal.

The Left and Right are equal.

The Top and Bottom are equal.

So we multiply each calculation by 2:

As = 2(4*3) + 2(5*3) + 2(4*5),

As = 24 + 30 + 40 = 94cm^2.

;

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