Advertisements
Advertisements
प्रश्न
Find the weight of solid rectangular iron piece of size 50 cm × 40 cm × 10cm, if 1 cm3 of iron weighs 8 gm.
Advertisements
उत्तर
\[\text { The dimension of the rectangular piece of iron is 50 cm }\times 40 cm \times 10 cm . \]
\[\text { i . e . , volume } = 50 cm \times 40 cm \times 10 cm = 20000 {cm}^3 \]
\[\text { It is given that the weight of 1 }{cm}^3 \text { of iron is 8 gm } . \]
\[ \therefore \text { The weight of the given piece of iron = 20000 } \times 8 gm\]
\[ = 160000 gm\]
\[ = 160 \times 1000 gm\]
\[ = 160 kg ( \because 1 kg = 1000 gm)\]
APPEARS IN
संबंधित प्रश्न
Each edge of a cube is increased by 50%. Find the percentage increase in the surface area of the cube.
An open box is made of wood 3 cm thick. Its external length, breadth and height are 1.48 m, 1.16 m and 8.3 m. Find the cost of painting the inner surface of Rs 50 per sq. metre.
The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.
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 wall.
Find the area of metal-sheet required to make an open tank of length = 10 m, breadth = 7.5 m and depth = 3.8 m.
A cube of edge 6 cm and a cuboid with dimensions 4 cm x x cm x 15 cm are equal in volume. Find:
(i) the value of x.
(ii) the total surface area of the cuboid.
(iii) the total surface area of the cube.
(iv) which of these two has a greater surface and by how much?
The sum of the radius and the height of a cylinder is 37 cm and the total surface area of the cylinder is 1628 cm2. Find the height and the volume of the cylinder.
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.
The length and breadth of a cuboid are 20 cm and 15 cm respectively. If its volume is 2400 cm3, find its height.
Find the length of the largest pole that can be placed in a room of dimensions 12 m × 4 m × 3 m.
