Advertisements
Advertisements
प्रश्न
A closed box is made of wood 5 mm thick. The external length, breadth and height of the box are 21 cm, 13 cm and 11 cm respectively. Find the volume of the wood used in making the box.
Advertisements
उत्तर
Thickness of the closed box
= 5mm
= 0.5cm
External Dimensions are:
length = 21cm
breadth = 13cm
height = 11cm
Internal dimensions = External dimensions - 2(thickness)
∴ Internal Dimensions are:
length = 20cm
breadth = 12cm
height = 10cm
Volume ofthe wood used in making the box
= Volume of External cuboid - Volume of internal cuboid
= (21 x 13 x 11) - (20 x 12 x 10)
= 3003 - 2400
= 603cm3
Hence, the volume of wood used in making the box is 603cm3.
APPEARS IN
संबंधित 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 per m2.
A water tank is 3 m long, 2 m broad and 1 m deep. How many litres of water can it hold?
How many bricks each of size 25 cm × 10 cm × 8 cm will be required to build a wall 5 m long, 3 m high and 16 cm thick, assuming that the volume of sand and cement used in the construction is negligible?
A swimming pool is 250 m long and 130 m wide. 3250 cubic metres of water is pumped into it. Find the rise in the level of water.
Three cubes of each side 4 cm are joined end to end. Find the surface area of the resulting cuboid.
How many persons can be accommodated in a big-hall of dimensions 40 m, 25 m, and 15 m; assuming that each person requires 5 m3 of air?
The diameter of a garden roller is 1.4 m and it 2 m long. Find the maximum area covered by its 50 revolutions?
Find the Total Surface Area and the Lateral Surface Area of a cuboid whose dimensions are: length = 20 cm, breadth = 15 cm, height = 8 cm
Three cubes each of side 10 cm are joined end to end. Find the surface area of the resultant figure.
A rectangular sheet of dimensions 25 cm × 7 cm is rotated about its longer side. Find the volume and the whole surface area of the solid thus generated.
