The length of a square is increased by 15% and breadth decreased by 15%. The area of the rectangle so formed is - Mathematics

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MCQ

The length of a square is increased by 15% and breadth decreased by 15%. The area of the rectangle so formed is

Options

  • neither increases nor decreases

  • decreases by 2.25%

  • increases by 2.25%

  • decreases by 22.5%

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Solution

decreases by 2.25%

Explanation:

When length and breath are increased and decreased respectively. By 15% net effect on it area

`=15-15-(15xx15)/100` ........`["x"-"y"-("xy") /100]`

 = − 2.25%

i.e. decrease by 2.25%

Concept: Percentage, Discount and Partnership (Entrance Exam)
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