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
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
The perimeter of a square circumscribing a circle of radius a units is
  • 2 units
  • 4α units
  • 8α units
  • 16α units
The perimeter of the sector with radius 10.5 cm and sector angle 60° is
  • 32 cm
  • 23 cm
  • 41 cm
  • 11 cm
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
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
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
If the radius of a circle is doubled, its area becomes
  • 2 times
  • 4 times
  • 8 times
  • 16 times
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;
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
The radius of sphere is r cm. It is divided into . two equal parts. The whole surface area of two parts will be
  • 8πr² cm²
  • 6πr² cm²
  • 4πr² cm²
  • 3πr² cm²
If the diameter of a semicircular protractor is 14 cm, then its perimeter is .
  • 27 cm
  • 36 cm
  • 18 cm
  • 9 cm
A race track is in the form of a circular ring whose outer and inner circumferences are 396 m and 352 m respectively. The width of the track is
  • 63 m
  • 56 m
  • 7 m
  • 3.5 m
The area of the largest square that can be inscribed in a circle of radius 12 cm is
  • 24 cm²
  • 249 cm²
  • 288 cm²
  • 196√2 cm²
The area of the largest triangle that can be inscribed in a semicircle of radius r is
  • r²
  • 2r²
  • r³
  • 2r³
The area (in cm²) of the circle that can be inscribed in a square of side 8 cm is
  • 64 π
  • 16 π
  • 8 π
  • 32 π
If the perimeter of a circle is equal to that of a square, then the ratio of their areas is
  • 22 : 7
  • 14 : 11
  • 7 : 22
  • 11 : 14
The circumference of two concentric circles forming a ring are 88 cm and 66 cm. Taking π =\(\frac{22}{7}\), the width of the ring is
  • 14 cm
  • 7 cm
  • \(\frac{7}{2}\) cm
  • 21 cm
A steel wire when bent in the form of a square encloses an area of 121 cm². If the same wire is bent in the form of a circle, then the circumference of the circle is
  • 88 cm
  • 44 cm
  • 22 cm
  • 11 cm
The diameter of a circle whose area is equal to sum of the areas of the two circles of radii 40 cm and 9 cm is
  • 41 cm
  • 49 cm
  • 82 cm
  • 62 cm
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