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  • Question
  • 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

  • Correct Answer
  • 3cm 

    Explanation

    ?r = 66 7

     r =3


  • Area problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. A semicircular shaped window has diameter of 63cm. Its perimeter equals

    • Options
    • A. 162
    • B. 132
    • C. 142
    • D. 172
    • Discuss
    • 4. 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
    • Discuss
    • 5. 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
    • 6. 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
    • 7. What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high ?

    • Options
    • A. 13 m
    • B. 14 m
    • C. 15 m
    • D. 16 m
    • Discuss
    • 8. The diagonals of two squares are in the ratio of 2:5. Find the ratio of their areas.

    • Options
    • A. 2:25
    • B. 3:25
    • C. 4:25
    • D. 6:25
    • Discuss
    • 9. An equilateral triangle is described on the diagonal of a square. What is the ratio of the area of the triangle to that of the square?

    • Options
    • A. 1:2
    • B. 1:3
    • C. 2:3
    • D. 3^(1/2) :2
    • Discuss
    • 10. The circumference of a circle, whose area is 24.64 sq.m

    • Options
    • A. 14.64
    • B. 16.36
    • C. 17.60
    • D. 18.40
    • Discuss


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