Advertisements
Advertisements
प्रश्न
The length and breadth of a hall are in the ratio 4: 3 and its height is 5.5 metres. The cost of decorating its walls (including doors and windows) at Rs. 6.60 per square metre is Rs. 5082. Find the length and breadth of the room.
Advertisements
उत्तर
Let the length be 4x and breadth be 3 x
Height = 5.5m [given]
Now it is given that cost of decorating 4 walls at the rate of `Rs 6.601 m^2` is `Rs. 5082 `
⇒ Area of four walls x rate = total cost of painting
`2(l+b)xxhxx6.60=5082`
`2(4x+3x)xx5.5xx6.60=5082`
`⇒7x= (5082)/(5.5xx2.6xx2)`
`⇒7x = 10`
`⇒x=10`
Length= 4x = 4 x 10 = 40m
Breadth = 3x = 3 x 10 = 30m
APPEARS IN
संबंधित प्रश्न
Find the ratio of the total surface area and lateral surface area of a cube.
Each edge of a cube is increased by 50%. Find the percentage increase in the surface area of the cube.
A wooden bookshelf has external dimensions as follows: Height = 110 cm, Depth = 25 cm, Breadth = 85 cm in following figure. The thickness of the plank is 5 cm everywhere. The external faces are to be polished and the inner faces are to be painted. If the rate of polishing is 20 paise per cm2 and the rate of painting is 10 paise per cm2. Find the total expenses required for polishing and painting the surface of the bookshelf.
A cuboidal block of solid iron has dimensions 50 cm, 45 cm and 34 cm. How many cuboids of size 5 cm by 3 cm by 2 cm can be obtained from this block? Assume cutting causes no wastage.
The rainfall on a certain day was 6 cm. How many litres of water fell on 3 hectares of field on that day?
A rectangular water reservoir contains 105 m3 of water. Find the depth of the water in the reservoir if its base measures 12 m by 3.5 m.
If two cubes each of side 6 cm are joined face to face, then find the volume of the resulting cuboid.
The length of the longest rod that can be fitted in a cubical vessel of edge 10 cm long, is
A wall 9 m long, 6 m high and 20 cm thick, is to be constructed using bricks of dimensions 30 cm, 15 cm, and 10 cm. How many bricks will be required?
An open box of length 1.5 m, breadth 1 m, and height 1 m is to be made for use on a trolley for carrying garden waste. How much sheet metal will be required to make this box? The inside and outside surface of the box is to be painted with rust-proof paint. At a rate of 150 rupees per sqm, how much will it cost to paint the box?
