Home
Class 9
MATHS
A wooden toy is in the form of a cone su...

A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base of the cone is 5cm and its height is 4cm. Find the cost of painting the toy at the rate of Rs. 5 per `1000c m^2dot`

Text Solution

Verified by Experts

Diameter of cone= Diameter of sphere
`r_(sphere)=6/2=3cm`
TSA=`(S.A)_(sphere)+(S.A)_(con e)`
`=2pir^2+pirl`
`=33picm^2`
Cost=Area*cost|`m^2`
`=33*pi*5/1000Rs=0.51Rs`.
Promotional Banner

Topper's Solved these Questions

  • SURFACE AREA AND VOLUME OF A RIGHT CIRCULAR CYLINDER CONE

    RD SHARMA|Exercise All Questions|128 Videos

  • TABULAR REPRESENTATION OF STATISTICAL DATA

    RD SHARMA|Exercise All Questions|62 Videos

Similar Questions

Explore conceptually related problems

A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base of the cone is 16cm and its height is 15cm. Find the cost of painting the toy at R s .7\ p e r\ 100\ c m^2dot

The diameter of the base of a cone is 6 cm and height is 4 cm. Find its curved surface area.

A toy is in the form of a cone mounted on the hemisphere with the same radius. The diameter of the base of the conical portion is 12 cm and its height is 8 cm. What is the volume of the toy?

A toy is in the form of a cylinder with hemispherical ends. If the whole length of the toy is 90 cm and its diameter is 42 cm , find the cost of painting the toy at the rate of 70 paise per sq m .

A toy is in the form of a cone mounted on a hemisphere with the same radius. The diameter of the base of the conical portion is 6 cm and its height is 4 cm. Determine the surface area of the toy (Use pi=3. 14 )

The diameter of the base of a right circular cone is 18 cm and its slant height is 15cm. Find the height of the cone.

Diameter of the base of a cone is 10.5cm and its slant height is 10cm. Find its curved surface area.

A toy is in the shape of a cone mounted on a hemisphere of same base radius. If the volume of the toy is 231 cm^3 and its diameter is 7 cm, find the height of the toy

A toy is in the form of a cone mounted on the hemisphere with the same radius. The diameter of the base of the conical portion is 12 cm and its height is 8 cm. What is the total surface area of the toy?

RD SHARMA-SURFACE AREA AND VOLUME OF A SPHERE -All Questions
  1. A dome of a building is in the form of a hemisphere. From inside, i...

    Text Solution

    |

  2. Twenty seven solid iron spheres, each of radius r and surface area S a...

    Text Solution

    |

  3. A wooden toy is in the form of a cone surmounted on a hemisphere. T...

    Text Solution

    |

  4. A toy is in the shape of a right circular cylinder with a hemispher...

    Text Solution

    |

  5. Three solid spheres of iron whose diameters are 2cm, 12cm and 16cm,...

    Text Solution

    |

  6. How many spherical lead shots each 4.2 cm in diameter can be obtain...

    Text Solution

    |

  7. A sphere of diameter 6cm is dropped in a right circular cylindrical...

    Text Solution

    |

  8. A solid lead ball of radius 7cm was melted and then drawn into a wi...

    Text Solution

    |

  9. A sphere, a cylinder and a cone are of the same radius and same hei...

    Text Solution

    |

  10. Find the surface area and total surface area of a hemisphere of rad...

    Text Solution

    |

  11. Find the surface area of a sphere of radius 7cm.

    Text Solution

    |

  12. The internal and external diameters of a hollow hemispherical vesse...

    Text Solution

    |

  13. The internal and external diameters of a hollow hemi-sphereical ves...

    Text Solution

    |

  14. A right circular cylinder just encloses a sphere of radius r as sho...

    Text Solution

    |

  15. Show that the surface area of a sphere is the same as that of the l...

    Text Solution

    |

  16. A cone, a hemisphere and a cylinder stand on equal bases and have t...

    Text Solution

    |

  17. The larges sphere is carved out of a cube of side 10.5 cm. Find the...

    Text Solution

    |

  18. If the radius of a sphere is doubled, what is the ratio of the volu...

    Text Solution

    |

  19. A spherical ball of lead 3cm in diameter is melted and recast into ...

    Text Solution

    |

  20. Find the surface area of a sphere of radius 7cm.

    Text Solution

    |