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  • Question
  • The area of a circular field is 13.86 hectares. Find the cost of fencing it at the rate of Rs. 4.40 per metre.


  • Options
  • A. 2808
  • B. 3808
  • C. 4808
  • D. 5808

  • Correct Answer
  • 5808 

    Explanation

    Area = (13.86 x 10000) sq.m = 138600 sq.m

     

    ?R 2 = 138600 ? R 2 = 138600 × 7 22 ? R = 210 m  

     

    Circumference =  2 ?R 2 = 2 × 22 7 × 210 = 1320 m  

     

    Cost of fencing = Rs. (1320 x 4.40) = Rs. 5808.


  • Area problems


    Search Results


    • 1. In two triangles, the ratio of the areas is 4 : 3 and the ratio of their heights is 3 : 4. Find the ratio of their bases.

    • Options
    • A. 13:9
    • B. 16:9
    • C. 15:9
    • D. 14:9
    • Discuss
    • 2. Find the area of a square, one of whose diagonals is 3.8 m long.

    • Options
    • A. 4.22 sq.m
    • B. 5.22 sq.m
    • C. 6.22 sq.m
    • D. 7.22 sq.m
    • Discuss
    • 3. How many square units in 13 by 9?

    • Options
    • A. 13
    • B. 9
    • C. 117
    • D. 13/9
    • Discuss
    • 4. The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased ?

    • Options
    • A. 90%
    • B. 88%
    • C. 85%
    • D. 84%
    • Discuss
    • 5. The breadth of a rectangular field is 75% of its length. If perimeter of the field is 1050 m, what will be th area of field ?

    • Options
    • A. 65700 sq.m
    • B. 54500 sq.m
    • C. 78700 sq.m
    • D. 67500 sq.m
    • Discuss
    • 6. A semicircular shaped window has diameter of 63cm. Its perimeter equals

    • Options
    • A. 162
    • B. 132
    • C. 142
    • D. 172
    • Discuss
    • 7. A triangle and a parallelogram are constructed on the same base such that their areas are equal. If the altitude of the parallelogram is 100 m , then the altitude of the triangle is

    • Options
    • A. 200m
    • B. 300m
    • C. 400m
    • D. 100m
    • Discuss
    • 8. What is the area of an obtuse angled triangle given below with two sides are 8 and 12 and the angle included between two sides is 150 deg?

    • Options
    • A. 48 sq units
    • B. 24 sq units
    • C. 12 sq units
    • D. 6 sq units
    • Discuss
    • 9. A sector of 120 degrees, cut out from a circle, has an area of 66/7 sq cm. Find the radius of the circle.

    • Options
    • A. 1cm
    • B. 2cm
    • C. 3cm
    • D. 4cm
    • Discuss
    • 10. The length of the room is 5.5m and width is 3.75m. Find the cost of paving the floor by slabs at the rate of Rs.800 per sq meter

    • Options
    • A. Rs.16500
    • B. Rs.15500
    • C. Rs.17500
    • D. Rs.18500
    • Discuss


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