Advertisements
Advertisements
प्रश्न
Find the area of the cardboard required to make a closed box of length 25 cm, 0.5 m and height 15 cm.
Advertisements
उत्तर
\[\text { Length of the box }= 25 cm \]
\[\text { Width of the box = 0 . 5 m }\]
\[ = 0 . 5 \times 100 cm ( \because 1 m = 100 cm)\]
\[ = 50 cm \]
\[\text { Height of the box = 15 cm }\]
\[ \therefore \text { Surface area of the box = 2 }\times\text { (length }\times \text { breadth + breadth }\times \text { height + length } \times \text { height)} \]
\[ = 2 \times (25 \times 50 + 50 \times 15 + 25 \times 15)\]
\[ = 2 \times (1250 + 750 + 375)\]
\[ = 4750 {cm}^2\]
संबंधित प्रश्न
Water is pouring into a cubiodal reservoir at the rate of 60 litres per minute. If the volume of the reservoir is 108 m3, find the number of hours it will take to fill the reservoir.
Find the volume in cubic metre (cu. m) of the cuboid whose dimensions is length = 10 m, breadth = 25 dm, height = 50 cm.
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?
Find the surface area of a cuboid whose length = 10 cm, breadth = 12 cm, height = 14 cm.
The dimensions of an oil tin are 26 cm × 26 cm × 45 cm. Find the area of the tin sheet required for making 20 such tins. If 1 square metre of the tin sheet costs Rs 10, find the cost of tin sheet used for these 20 tins.
A classroom is 7 m long, 6 m broad and 3.5 m high. Doors and windows occupy an area of 17 m2. What is the cost of white-washing the walls at the rate of Rs 1.50 per m2.
A cube whose volume is 1/8 cubic centimeter is placed on top of a cube whose volume is 1 cm3. The two cubes are then placed on top of a third cube whose volume is 8 cm3. The height of the stacked cubes is
Find the volume and the total surface area of a cuboid, whose :
l = 3.5 m, b = 2.6 m and h = 90 cm
If radii of two cylinders are in the ratio 4 : 3 and their heights are in the ratio 5: 6, find the ratio of their curved surfaces.
The surface area of a cuboid formed by joining face to face 3 cubes of side x is 3 times the surface area of a cube of side x.
