Advertisements
Advertisements
प्रश्न
The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost
of white washing the walls of the room and the ceiling at the rate of Rs. 7.50 m2.
Advertisements
उत्तर
Total area to be washed = `lb+2 (l+b)h`
Where length `(l)=5m`
Breath (b)= 4m
Height (h)=3m
`∴("Total area to be white washed") =(5xx4)+2(5+4)xx3`
`=20+54=74m^2`
Now,
Cost of white washing `1m^2 is Rs 7.50`
=Rs.555
APPEARS IN
संबंधित प्रश्न
There are two cuboidal boxes as shown in the adjoining figure. Which box requires the lesser amount of material to make?
 |
 |
| (a) | (b) |
The length of a hall is 18 m and the width 12 m. The sum of the areas of the floor and the
flat roof is equal to the sum of the areas of the four walls. Find the height of the hall.
A tank is 8 m long, 6 m broad and 2 m high. How much water can it contain?
Find the surface area of a cuboid whose length = 10 cm, breadth = 12 cm, height = 14 cm.
The number of cubes of side 3 cm that can be cut from a cuboid of dimensions 10 cm × 9 cm × 6 cm, is ______.
On a particular day, the rain fall recorded in a terrace 6 m long and 5 m broad is 15 cm. The quantity of water collected in the terrace is
The external dimensions of an open wooden box are 65 cm, 34 cm, and 25 cm. If the box is made up of wood 2 cm thick, find the capacity of the box and the volume of wood used to make it.
Find the length of the largest pole that can be placed in a room of dimensions 12 m × 4 m × 3 m.
Find the capacity of water tank, in litres, whose dimensions are 4.2 m, 3 m and 1.8 m?
