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  • Question
  • In a rectangle, length is three times its breadth. If the length and the breadth of the rectangle are increased by 30% and 100% respectively, then its perimeter increases by


  • Options
  • A. 40/3%
  • B. 20%
  • C. 25%
  • D. 27%

  • Correct Answer
  • 25% 

    Explanation
    Let the breadth of the rectangle = x
    Length of the the rectangle will be = 3 times of breadth = 3x
    So the initial perimeter = 2(length + breadth) = 2(x + 3x) = 8x
    New breadth after increase = x + 10x/100 = 1.1x
    New length after increase = 3x + 30*3x/100 = 3.9x
    New perimeter = 2(1.1x + 3.9x) = 10x
    Percentage change in perimeter = ( 10x-8x)*100/8x = 25%
  • Tags: Bank Exams

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