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10th Class Mathematics Quadratic Equations Question Bank Quadratic Equation

  • question_answer
    The length and breadth of a rectangle are \[(3k+1)\] cm and \[\left( 2k1 \right)\] cm respectively. Find the perimeter of the rectangle if its area is\[144\text{ }c{{m}^{2}}\].

    A)  50 cm  

    B)  20 cm        

    C)  30 cm             

    D)  40 cm

    Correct Answer: A

    Solution :

    (a): Form \[\text{ e}{{\text{q}}^{ns}}.(3k+1)(2k-1=144)\] and find k. Perimeter\[=2\{(3k+1)+(2k-1)\}\]                 


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