Arithmetic Aptitudes › Area › Question #5326
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QA rectangular field has 3:4 sides and a surface area of 7500 m2. How much does it cost to fence it at 25 paise per metre?

ID: #5326 Area 152 views
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#5326Q ID
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  • A Rs. 87.50 ✔ ✖
  • B Rs. 84.70 ✔ ✖
  • C Rs. 87.20 ✔ ✖
  • D Rs. 77.50 ✔ ✖
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Explanation


Ratio between the sides of rectangle = 3: 4

   Let the ratio constant be x then,

   Length = 3x and breadth = 4x

   Area = L x B

              7500=3x × 4x=12x^2
              7500/12= x^2=625

                x=25

Length = 3 x 25 = 75 m, and Breadth = 4 x 25 = 100 m

Perimeter = 2(75 + 100) = 2 x 175 = 350 m

Cost of fencing 1 meter = 25 paise

Cost of fencing 350 m = 350 x 25 = 8750 paise

In rupees: Rs. 87.50
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