Posted by jay on Tuesday, November 15, 2011 at 10:10pm.
The width of a rectangle is 6 cm less than its length. If the area of the rectangle is 135 square cm, find the dimensions. Then find the perimeter of the rectangle.

geometry  Bosnian, Tuesday, November 15, 2011 at 10:35pm
W = Width
L = Length
A = Area
W = L  6
A = W * L
135 =( L  6 ) * L
135 = L ^ 2  6 L
The exact solution are :
L =  9 cm
and
L = 15 cm
The length can't be negative so:
L = 15 cm
W = L  6
W = 15  6 = 9 cm
A = W * L = 15 * 9 = 135 cm ^ 2
P. S.
If you don't know how to solve equation:
135 = L ^ 2  6 L
Go on:
wolframalpha dot com
When page be open in rectangle type:
solve 135 = L ^ 2  6 L
and click option =
After few seconds when you see result click option:
Show steps

geometry  Anonymous, Thursday, June 14, 2012 at 12:10pm
perimeter of a rectangle with length 6.6m and width 4.5
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