Shariq Posted September 19, 2005 Share Posted September 19, 2005 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 tabletop 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 approximate length, in feet? (A) 12 (B) 10 © 9 (D) 8 (E) 6 Pls explain ur working OA is E Quote Link to comment Share on other sites More sharing options...
Pricha Posted September 19, 2005 Share Posted September 19, 2005 E GIVEN: Width = 3 ; area = x Hence length of the tabletop = x/3. we know that The length of the strip = permeter of the tabletop. x = 2 (3+x/3) x = 6 + 2x/3 hence x =18 & length of the tabletop = x/3 = 6. Quote Link to comment Share on other sites More sharing options...
Shariq Posted September 19, 2005 Author Share Posted September 19, 2005 thnx pricha... Quote Link to comment Share on other sites More sharing options...
RCfobia Posted September 19, 2005 Share Posted September 19, 2005 E is the answer suppose a is width and b is length. By question 2(a+b) = ab a+b = ab/2 3+b = 3b/2 ==b =6= length Quote Link to comment Share on other sites More sharing options...
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