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July 22, 2014

July 22, 2014

Posted by **Krystal.T** on Saturday, June 23, 2012 at 12:16pm.

Find an expression for the total surface area, A cm2, in term of x.

- math -
**MathMate**, Saturday, June 23, 2012 at 5:42pmLet L,W and H be the dimensions of the rectangular block.

Total surface area

A=2(LW+WH+HL)

So if

H=height=x

then

W=x+2, and

L=2W=2(x+2)

Substitute these values of H,W and L into the equation for A and simplify.

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