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7th Class Mathematics Mensuration Question Bank Mensuration (Perimeter & Area)

  • question_answer
    The base of a parallelogram is twice its height. If the area of parallelogram is \[162\text{ }c{{m}^{2}},\] then find the base.

    A)  \[9\text{ }cm\]     

    B)                     \[~18\text{ }cm\]  

    C)  \[32\text{ }cm\]                     

    D)  \[50\text{ }cm\]

    Correct Answer: B

    Solution :

    (b): \[b=2h:A=b\times h=2{{h}^{2}}=\text{ }162c{{m}^{2}}\] \[\Rightarrow {{h}^{2}}=81\Rightarrow h=9\Rightarrow b=2h=18cm\]     


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