Home
Class 8
MATHS
The perimeter of a floor of a room is 30...

The perimeter of a floor of a room is 30m and its height is 3m. Find the area of four walls of the room.

Text Solution

Verified by Experts

Given
Perimeter`=30`
Height`=3m`
Area of` 4` wall= perimeter**height
`=30xx3`
`=90m^2`
Promotional Banner

Topper's Solved these Questions

  • MENSURATION-I (AREA OF A TRAPEZIUM AND A POLYGON

    RD SHARMA|Exercise All Questions|86 Videos

  • MENSURATION-III (SURFACE AREA AND VOLUME OF A RIGHT CIRCULAR CYLINDER)

    RD SHARMA|Exercise All Questions|109 Videos

Similar Questions

Explore conceptually related problems

The perimeter of the floor of a room is 18 m and its height is 3 m. What is the area of 4 walls of the room?

(iii) Area of four walls of a room

The perimeter of a rhombus is 40 m and its height is 5 m. Its area is :

The perimeter of the floor of a room is 18 m. What is the area of the walls of the room, 1f the height of the room is 3 m ?

Area of floor of a room is 48 sq m. If its height is 5 m, then the volume of the room is

The floor of a room is of size 4 m xx 3 m and its height is 3 m. The walls and ceiling of the room require painting. The area to be painted is

The length of a room is (3x + 10) m and the breadth of the room is (2x + 5) m. The area of four walls of the room is (60x + 180) m2. What is the height of the room?

The area of the four walls of a room is 120m2 and the length is twice the breadth. If the height of the room is 4m, then the area of the floor is (a) 48m2 (b) 49m2 (c) 50m2 (d) 52m2

RD SHARMA-MENSURATION-II (VOLUMES AND SURFACE AREAS OF A CUBOID AND A CUBE)-All Questions
  1. A classroom is 11m long, 8m wide and 5m high. Find the sum of the a...

    Text Solution

    |

  2. A swimming pool is 20m long 15m wide and 3m deep. Find the cost of ...

    Text Solution

    |

  3. The perimeter of a floor of a room is 30m and its height is 3m. Fin...

    Text Solution

    |

  4. Show that the product of the areas of the floor and two adjacent wa...

    Text Solution

    |

  5. The walls and ceiling of a room are to be plastered. The length, br...

    Text Solution

    |

  6. A cuboid has total surface area of 50\ m^2 and lateral surface area is...

    Text Solution

    |

  7. A classroom is 7m long, 6m broad and 3.5m high. Doors and windows o...

    Text Solution

    |

  8. The central hall of a school is 80m long and 8m high. It has 10 door...

    Text Solution

    |

  9. The volume of a cuboid is 440\ c m^3 and the area of its base is 88\ c...

    Text Solution

    |

  10. The volume of a cube is 1, 000\ c m^3dot Find its total surface ...

    Text Solution

    |

  11. The dimensions of a metallic cuboid are: 100\ c mxx80xx64\ c m . It...

    Text Solution

    |

  12. How many 3\ m e t r e\ c u b e s can be cut from a cuboid measuring...

    Text Solution

    |

  13. A cube of 9cm edge is immersed completely in a rectangular vessel c...

    Text Solution

    |

  14. The length of a cold storage is double its breadth. Its height is 3...

    Text Solution

    |

  15. Two cubes each of 10cm edge are joined end to end. Find the surface...

    Text Solution

    |

  16. The sum of length, breadth and depth of a cuboid is 19\ c m and leng...

    Text Solution

    |

  17. A plot of land in the form of a rectangle has a dimension 240 m\ x\...

    Text Solution

    |

  18. Three cubes each of side 5c m are joined end to end. Find the surface ...

    Text Solution

    |

  19. Find the number of bricks, each measuring 25 cm, 12.5 cm and 7.5 cm re...

    Text Solution

    |

  20. A metallic sheet is of the rectangular shape with dimensions 48 c m...

    Text Solution

    |