CBSE  /  Class 10  /  Maths  /  Areas related to Circles

  • 1. 
    Perimeter of a sector of a circle whose central angle is 90° and radius 7 cm is

  • 35 cm
  • 25 cm
  • 77 cm
  • 7 cm

  • 2. 
    The area of a circle that can be inscribed in a square of side 10 cm is

  • 40π cm²
  • 30π cm²
  • 100π cm²
  • 25π cm²

  • 3. 
    The perimeter of a square circumscribing a circle of radius a units is

  • 2 units
  • 4α units
  • 8α units
  • 16α units

  • 4. 
    The perimeter of the sector with radius 10.5 cm and sector angle 60° is

  • 32 cm
  • 23 cm
  • 41 cm
  • 11 cm

  • 5. 
    In a circle of diameter 42 cm, if an arc subtends an angle of 60° at the centre, where π = \(\frac{22}{7}\) then length of arc is

  • 11 cm
  • \(\frac{22}{7}\)cm
  • 22 cm
  • 44 cm

  • 6. 
    The perimeter of a sector of radius 5.2 cm is 14 cm, the area of the sector is

  • 31.2 cm²
  • 15 cm²
  • 15.6 cm²
  • 16.6 cm²

  • 7. 
    If the perimeter of a semicircular protractor is 72 cm where π = \(\frac{22}{7}\), then the diameter of protractor is

  • 14 cm
  • 33 cm
  • 28 cm
  • 42 cm

  • 8. 
    If the radius of a circle is doubled, its area becomes

  • 2 times
  • 4 times
  • 8 times
  • 16 times

  • 9. 
    If the sum of the circumferences of two circles with radii R1 and R2 is equal to circumference of a circle of radius R, then

  • R1 + R2 = R
  • R1 + R2 > R
  • R1 + R2 < R
  • Can’t say;

  • 10. 
    The perimeter of a circular and square fields are equal. If the area of the square field is 484 m² then the diameter of the circular field is

  • 14 m
  • 21 m
  • 28 m
  • 7 m
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