Home
Class 10
MATHS
The height and radius of the cone of whi...

The height and radius of the cone of which the frustum is a part are `h_1 and r_1`respectively.If `h_2 and r_2`are the heights and radius of the smaller base of the frustum respectively and `h_2:h_1=1:2`then the value of `r_2:r_1`is

A

`1:2`

B

`2:1`

C

`3:1`

D

`4:1`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SURFACE AREA AND VOLUMES

    R G PUBLICATION|Exercise EXERCISE|69 Videos

  • STATISTICS

    R G PUBLICATION|Exercise EXERCISE|39 Videos

  • TRIANGLES

    R G PUBLICATION|Exercise EXERCISE|108 Videos

Similar Questions

Explore conceptually related problems

What is the height at which the value of g is the same as at a depth of R/2?

What is the volume of a solid sphere of radius 2R?

Obtain the volume of rectangular boxes with the following length, breadth and height respectively. 2p, 4q, 8r

(ii) if rcostheta=1 , r sintheta=1 find the value of r

A bucket is in the form of frustum of a cone and holds 28.49 liters of milk. The radius of the top and bottom are 28 cm and 21 cm respectively. Find the height of the bucket.

Three electric point charges q_0,q_1 and q_2 are at distances vect r_0,vec r_1 and vec r_2 respectively with respect to same origin. What is the force on charge q_0 in the filed of charges q_1 and q_2 ?

A right circular cone is 3.6 cm high and the radius of its base is 1.6 cm. It is melted and recast into a right cylinder cone with radius of its base as 1.2 cm, find the height.

If the altitude of an equilateral triangle be h and the circle inscribed in it of radius r, the altitude h is _____ times that of r.

What is the rate of change of the area of a circle with respect to its radius r, when r= (5)/2 cm?

R G PUBLICATION-SURFACE AREA AND VOLUMES-EXERCISE
  1. During conversion of a solid from one shape to another,the volume of t...

    Text Solution

    |

  2. The diameter of a sphere is 6 cm.It is melted and drawn into a wire of...

    Text Solution

    |

  3. The volume of a cube is 2744cm^3.Its surface area is a)1176cm^2 b) 61...

    Text Solution

    |

  4. The length of the diagonal of a cube 6sqrt3cm.Its total surface area i...

    Text Solution

    |

  5. If edge of a cube is increased by 50% the percentage increase in the s...

    Text Solution

    |

  6. A metallic sphere of radius 10.5cm is melted and then recast into smal...

    Text Solution

    |

  7. A sphere of radius 6cm is dropped into a cylindrical vessel partly fil...

    Text Solution

    |

  8. The curve surface area of a right circular cone of height 15cm and bas...

    Text Solution

    |

  9. In a shower,5 cm rain falls.The volume of the water that falls on 2 he...

    Text Solution

    |

  10. The ratio of the total surface area to the lateral surface area of cyl...

    Text Solution

    |

  11. On increasing each of the radius of the base and the height of a cone ...

    Text Solution

    |

  12. If three metallic spheres of radii 6cm,8cm and 10cm are melted to form...

    Text Solution

    |

  13. A right triangle with sides 3cm,4cm and 5cm is rotated about the side ...

    Text Solution

    |

  14. The volume of the greatest sphere that can be cut off from a cylindric...

    Text Solution

    |

  15. The maximum volume of a cone that can be carved out of a solid hemisph...

    Text Solution

    |

  16. The diameter of the ends of a frustum of a cone are 32 cm and 20cm.If ...

    Text Solution

    |

  17. The circular ends of a bucket are of radii 35cm and 14 cm and the heig...

    Text Solution

    |

  18. The height and radius of the cone of which the frustum is a part are h...

    Text Solution

    |

  19. If the radius of the base of a right circular cylinder is halved,keepi...

    Text Solution

    |

  20. A soild frustum is of height 8 cm.If the lower and upper ends are 3cm ...

    Text Solution

    |