8th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer
    The length and breadth of a square are increased by 40% and 30% respectively. The area of resulting rectangle exceeds the area of the square by:

    A) 42%                            

    B) 62%

    C) 82%              

    D) None of these

    Correct Answer: C

    Solution :

    Let the side of the square be 'a' unit. Then, its area \[1{{m}^{2}}=10000c{{m}^{2}}\] sq. unit The length of resulting rectangle\[1Kilolitre=1000litre\]unit And the breadth of resulting rectangle \[=1{{m}^{3}}\]unit Hence, area of rectangle\[1acre=100acre\]sq. unit Now, the percentage increment in the area \[\text{100 hectare =1k}{{\text{m}}^{\text{2}}}\]            


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