Posted by Krystal.T on Saturday, June 23, 2012 at 12:16pm.
A rectangular block is 2 cm wider than it is high and twice as long as it it wide. Let x cm be the height of the block.
Find an expression for the total surface area, A cm2, in term of x.

math  MathMate, Saturday, June 23, 2012 at 5:42pm
Let 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.

math  tylee, Wednesday, August 27, 2014 at 12:15am
on a piece of paper draw a rectangle paddock 20 cm long and 10 cm wide
?

math  tylee, Wednesday, August 27, 2014 at 12:16am
on a piece of paper draw a rectangle paddock 20 cm long and 10 cm wide ?
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