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7th Class Mathematics Perimeter and Area Question Bank Perimeter and Area

  • question_answer
    A field is 225 m long and 175 m wide. It has two roads in its centre of uniform width of 5 m, one parallel to its length and the other parallel to its breadth. Find the cost of levelling the roads at Rs. 3 per square metre.

    A)          \[Rs.\,1975\]               

    B)  \[Rs.\,1125\]   

    C)                     \[Rs.\,5925\]   

    D)  \[Rs.6125\]

    Correct Answer: C

    Solution :

            Area of roads \[=[(175\times 5)+(225\times 5)-(5)2]{{m}^{2}}\] \[=(875+1125-25){{m}^{2}}=1975\,{{m}^{2}}\] \[\therefore \]Cost of levelling the roads \[=Rs.\,(1975\times 3)=Rs.\,5925\]


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