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The area of a square field 3136 sq m, if the length of cost of drawing barbed wire 3 m around the field at the rate of Rs.1.50 per meter. Two gates of 1 m width each are to be left for entrance. What is the total cost?

Correct answer: C. Rs.999

  • A. Rs.1014
  • B. Rs.1140
  • C. Rs.999
  • D. Rs.1085

Explanation

The square's side is √3136 m = 56 m, so its perimeter is 4 x 56 m = 224 m. Three rounds with two 1 m gates left open require (224 m - 2 m) x 3 = 666 m of wire, costing 666 m x Rs.1.50 per m = Rs.999. Option c is correct; option a usually comes from charging for all four sides without subtracting the gates.

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Area measures the surface enclosed by two-dimensional figures, while volume measures the space occupied by three-dimensional solids. Problems use formulas for rectangles, triangles, circles, prisms, cylinders, cones, spheres, and composite figures, including unit conversion and the distinction between surface area, lateral area, and volume.

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