Home
Class 8
MATHS
A classroom is 11m long, 8m wide and 5m ...

A classroom is 11m long, 8m wide and 5m high. Find the sum of the areas of its floor and the four walls (including doors, windows, etc.)

Text Solution

Verified by Experts

Given
Length`=11`cm
Wide`=8`cm
Height`=5`cm
lateral surface area`=(lb+bh)xx2`
`=(11xx8+8xx5)xx2`
`=(88+40)xx2`
`=128xx2`
`=546`m
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

A room is 16 m long ,7 m broad and 8 m high. Find the cost of white washing the four walls of room at Rs. 7.5 per m^(2) , white washing is not to be done on the doors and windows , which occupy 65 m^2 .

A godown is 50 m long, 40 m broad and 10 m high. Find the cost of whitewashing its four walls and ceiling at Rs.20 per square metre.

A classroom is 10 m long, 6.4 m wide and 5m high. If each student be given 1.6 m^(2) of the floor area, how many students can be accommodated in the room ? How many cubic metres of air would each student get ?

The length and breadth of a cuboidal store are in the ratio 2 : 1 and its height is 3.5 metres. If the area of its four walls (including doors) is 210 m^2 , then its volume is

A godown is 15m long and 12 m broad. The sum of the area of the floor and the ceiling is equal to the sum of areas of the four walls. The volume (in m^(3) ) of the godown is :

A classroom is 7m long, 6m broad and 3.5m high. Doors and windows occupy an area of 17\ m^2dot What is the cost of white-washing the walls at the rate of Rs. 1. 50\ p e r\ m^2dot

RD SHARMA-MENSURATION-II (VOLUMES AND SURFACE AREAS OF A CUBOID AND A CUBE)-All Questions
  1. Find the surface area of a wooden box whose shape is of a cube, and...

    Text Solution

    |

  2. The dimensions of an oil tin are 26 c m\ x\ 26 c m\ x\ 45 c mdot Find ...

    Text Solution

    |

  3. A classroom is 11m long, 8m wide and 5m high. Find the sum of the a...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |