Home
Class 12
MATHS
A circular wire of radius 7 cms is cu...

A circular wire of radius 7 cms is cut and bend again into and arc of circle of radius 12 cms . Then angle subtended by the are at the centre is

A

`50^@`

B

`210^@`

C

`100^@`

D

`60^@`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS

    NEW JOYTHI PUBLICATION|Exercise EXERCISE|44 Videos
  • THREE DIMENSIONAL GEOMETRY

    NEW JOYTHI PUBLICATION|Exercise Objective|36 Videos
  • VECTOR ALGEBRA

    NEW JOYTHI PUBLICATION|Exercise CONTINUOUS EVALUATION|2 Videos

Similar Questions

Explore conceptually related problems

The circular wire of diameter 10 cm is cut and placed along the circumference of a circle of diameter 1 meter. The angle subtended by the wire at the centre of circle is equal to

Draw a circle of radius 2.7 cm. Draw a tangent to the circle at any point it.

Draw a tangent at any point R on the circle of radius 3.4 cm and centre at P ?

Find the length of an arc of a circle of radius 5cm subtending a central angle measuring 15^0dot

Find the length of an arc of a circle of radius 5cm subtending a central angle measuring 15^(@).

Draw a tangent to a circle of radius 3 cm and centre O at any point K on the circle.

NEW JOYTHI PUBLICATION-TRIGONOMETRIC FUNCTIONS-QUESTIONS FROM COMPETITIVE EXAMS
  1. The angles of a triangle ABC, are in Arithmetic progression and if b :...

    Text Solution

    |

  2. The angles of a triangle are in the ratio 1:3:5 then the grea...

    Text Solution

    |

  3. A circular wire of radius 7 cms is cut and bend again into and ...

    Text Solution

    |

  4. IF tan A + cot A=4 , then tan^4 A + cot ^4 A is equal to

    Text Solution

    |

  5. If tan ( theta/2)=t then ( 1-t^2 )/( 1+t^2) is equal to

    Text Solution

    |

  6. The period of the function y= sin 2x is

    Text Solution

    |

  7. If the angle of elevation of the top of a tower at a distance ...

    Text Solution

    |

  8. In triangle ABC , a (b^2 +c^2 ) cos A + b (c^2 +a^2 ) cos B + ...

    Text Solution

    |

  9. The measures of the sides of a triangle are 3,5 and 7 then th...

    Text Solution

    |

  10. IF x sin 45^@ cos ^2 60^@ = ( tan ^2 60^@ "cosec " 30^@)/(sec 45^@ ...

    Text Solution

    |

  11. IF tan ( A-B ) = 1, sec (A +B ) = (2)/(sqrt(3)) , the smallest po...

    Text Solution

    |

  12. If sec theta + tan theta = k, cos theta =

    Text Solution

    |

  13. IF alpha , beta and gamma are angles such that tan alpha + ...

    Text Solution

    |

  14. If n=1,2,3,……. then cos alpha cos 2 alpha cos 4 alpha ……. Cos 2^(...

    Text Solution

    |

  15. IF a = (pi)/( 18) radius then cos a + cos 2 a + …. + cos 18 ...

    Text Solution

    |

  16. the number of values of theta in the interval [ -pi , pi] satis...

    Text Solution

    |

  17. for any angle theta the expression (2 cos 8 theta + 1)/( 2...

    Text Solution

    |

  18. IF m tan ( theta - 30^@) = n tan ( theta + 120 ^2 ) then cos ...

    Text Solution

    |

  19. If x + (1)/(x ) =2 sin alpha , y +(1)/(y) =2 cos beta , then ...

    Text Solution

    |

  20. If f (x) = cos ( log e x ) then f(x) . f(y) - (1)/(2) [f(...

    Text Solution

    |