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A rectangle has length (3x-2) and breadth (2x+5). What is the expression for its perimeter?

Answer and explanation

Correct answer: \(10x+6\)

The perimeter of a rectangle is \(2(\text{length}+\text{breadth})\). Thus, \(2[(3x-2)+(2x+5)]=2(5x+3)=10x+6\). Hence, the correct expression is \(10x+6\). The expression \(5x+3\) is only the sum of the length and breadth, not the perimeter. Exam tip: A perimeter includes all four sides, so multiply the sum of length and breadth by 2.

Related tags

Algebraic ExpressionsRectangle PerimeterPolynomialsLinear ExpressionsMathematicsIntroduction To PolynomialsClass 9 Mcq

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