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  • Question
  • A circular piece of thin wire is converted into a rhombus of side 11 cm. Find the diameter of the circular piece?


  • Options
  • A. 28 cm
  • B. 3.5 cm
  • C. 7 cm
  • D. 14 cm

  • Correct Answer
  • 14 cm 

    Explanation

    Circular piece is 4 x 11 = 44 cm long,

    Then Circumference of circle is given by,

    44 = pi x D, where D is the diameter

    D = 44 / pi

    Take pi = 22 / 7, then

    D = 44 / (22/7) = (44 x 7) / 22

    D = 14 cm.


  • Area problems


    Search Results


    • 1. The area of a rectangle is 460 square metres. If the length is 15% more than the breadth, what is the breadth of the rectangular field?

    • Options
    • A. 20 m
    • B. 30 m
    • C. 40 m
    • D. 50 m
    • Discuss
    • 2. The length of a rectangle is twice its breadth. If its length is decreased by 5 cm and breadth is increased by 5 cm, the area of the rectangle is increased by 75 sq.cm. Find the length of the rectangle?

    • Options
    • A. 10cm
    • B. 20cm
    • C. 30cm
    • D. 40cm
    • Discuss
    • 3. The inner circumference of a circular race track, 14 m wide, is 440 m. Find radius of the outer circle

    • Options
    • A. 44
    • B. 22
    • C. 33
    • D. 84
    • Discuss
    • 4. The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area is:

    • Options
    • A. 2520
    • B. 2420
    • C. 2320
    • D. 2620
    • Discuss
    • 5. The length of a room is 5.5 m and width is 3.75 m. Find the cost of paying the floor by slabs at the rate of Rs. 800 per sq.metre.

    • Options
    • A. Rs.15500
    • B. Rs.16500
    • C. Rs.17500
    • D. Rs.18500
    • Discuss
    • 6. The area of a circle of radius 5 is numerically what percent its circumference?

    • Options
    • A. 150%
    • B. 250%
    • C. 350%
    • D. 450%
    • Discuss
    • 7. Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

    • Options
    • A. 56m
    • B. 16m
    • C. 14m
    • D. 76m
    • Discuss
    • 8. Square units 13 by 9 of an office area is

    • Options
    • A. 97
    • B. 117
    • C. 107
    • D. 127
    • Discuss
    • 9. Find the area of the trapezium, whose parallel sides are 12 cm and 10 cm, and distance between the parallel sides is 14 cm?

    • Options
    • A. 121 sq.com
    • B. 154 sq.com
    • C. 186 sq.com
    • D. 164 sq.com
    • Discuss
    • 10. The area of the circle is 220 sq.m, the area of the square inscribed in a circle will be

    • Options
    • A. 49
    • B. 70
    • C. 140
    • D. 150
    • Discuss


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