Home
Class 10
MATHS
AB and CD are respectively arcs of two c...

AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre O. If ZAOB = `30^@`, find the area of the shaded region.

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Two concentric circles have radii 20 cm and 15 cm. Find the area of ring shaped region

In fig., a square OABC is inscribed in a quadrant OPBQ. If OA = 20 cm, find the area of the shaded region.

Two concentric circles are of radii 5 cm and 3 cm. Find the length of the chord of the larger circle which touches the smaller circle.

In figure, OACB is a quadrant of a circle 3.5 cm. OD = 2 cm, find the area of shaded region.

With the same centre O ,draw two circles of radii 4 cm and 2.5 cm.

Two concentric circular loops of radii 1 cm and 20 cm are placed coaxially. Find mutual inductance of the arrangement.

In fig., ABC is a quadrant of a circle of radius 14 cm and a semi circle is drawn with BC as diameter. Find the area of the shaded region.

A square of side 3 cm is inscribed in a circle. Find the area of the shaded portion.

In Fig. 12.27, AB and CD are two diameters of a circle (with centre O) perpendicular to each other and OD is the diameter of the smaller circle. If OA = 7 cm, find the area of the shaded region.

MBD-Areas of Plane Figures.-Exercise
  1. AB and CD are respectively arcs of two concentric circles of radii 21 ...

    Text Solution

    |

  2. A bicycle wheel makes 500 revolutions in moving 11 km. Find the diamet...

    Text Solution

    |

  3. The area of a circle is equal to the sum of the areas of the two circl...

    Text Solution

    |

  4. The diameters of two circles are in the ratio of 4 : 3and the sum of t...

    Text Solution

    |

  5. The circumference of a circle is numerically equal to its area. Show t...

    Text Solution

    |

  6. The area enclosed between two concentric circles is 770 sq. cm given t...

    Text Solution

    |

  7. The circumference of a circle exceeds its diameter by 30. Find the cir...

    Text Solution

    |

  8. The cost of mowing the grass inside of circular lawn at the rate of Rs...

    Text Solution

    |

  9. A wire is in the form of a circle with diameter 21 cm. It is cut and b...

    Text Solution

    |

  10. Two circles of radii 15 cm and 8 cm touch each otherinternally. Find t...

    Text Solution

    |

  11. The radii of two circles are 8 cm and 6 cm respectively. Find the radi...

    Text Solution

    |

  12. A road, which is 7 m wide surrounds a circular path whose circumferenc...

    Text Solution

    |

  13. A chord of a circle of radius 12 cm subtends an angle of 120^@ at the ...

    Text Solution

    |

  14. In a circle of radius 21 cm, an arc subtends an angle of 60° at the ce...

    Text Solution

    |

  15. The radius of a semi-circular protactor is 14 cm. Find its perimeter a...

    Text Solution

    |

  16. The circumference of a circle is 88 cm. Find the area of the sector, w...

    Text Solution

    |

  17. The perimeter of a sector of a circle of radius 5.8 m is 27.2 m. Find ...

    Text Solution

    |

  18. A chord of a circle of radius 21 cm subtends an angle of 120^@ at the ...

    Text Solution

    |

  19. Find the radius of the circle if length of the arc is 4pi cm and angle...

    Text Solution

    |

  20. A square is made inside the circle. Find the area of that portion of t...

    Text Solution

    |

  21. In the fig. fourth quadrant of a circle is OACB where O is the centre ...

    Text Solution

    |