A rectangular tabletop consists of a piece of laminated wood bordered by a thin metal strip along its four edges. The surface area of the table top is x square feet, and the total length of the strip before it was attached was x feet. If the tabletop is 3 feet wide, what is its approx. length, in feet?
A 12
B 10
C 9
D 8
E 6
Got stuck...
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jayhawk2001
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Let l be the length of the tabletopjamesk486 wrote:A rectangular tabletop consists of a piece of laminated wood bordered by a thin metal strip along its four edges. The surface area of the table top is x square feet, and the total length of the strip before it was attached was x feet. If the tabletop is 3 feet wide, what is its approx. length, in feet?
A 12
B 10
C 9
D 8
E 6
Got stuck...
l * 3 = x
Also 2*l + 2*3 = x (this was the wire before it was used on the tabletop)
Equating
l*3 = 2*l + 6
Therefore l = 6
