6th Class Mathematics Mensuration Question Bank Mensuration (Perimeter & Area, Review of Earlier Concepts)

  • question_answer The floor of a hall measures 20 m by 20 m. A carpet is placed on the floor from wall to wall. What is the cost of the carpet if \[1\,\,{{m}^{2}}\]of carpet costs Rs. 50 and for every \[1\,\,{{m}^{2}}\] of carpet laid, \[\frac{1}{5}\,\,{{m}^{2}}\] of carpet material is wasted in cutting and laying?

    A)  Rs. 25000      

    B)  Rs. 20000     

    C)  Rs. 16000                  

    D)  Rs. 12000

    Correct Answer: A

    Solution :

    Effectively, \[\frac{4}{5}{{m}^{2}}\]costs Rs.50 \[\therefore \]  cost of \[400\,\,{{m}^{2}}(20\times 20)\] \[=\frac{Rs.\,\,50\times 5}{4}\times 400=25000\]


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