Advertisements
Advertisements
प्रश्न
A solid rectangular piece of iron measures 6 m by 6 cm by 2 cm. Find the weight of this piece, if 1 cm3 of iron weighs 8 gm.
Advertisements
उत्तर
\[\text { The dimensions of the an iron piece is 6 m } \times 6 cm \times 2 cm, i . e . , 600 cm \times 6 cm \times 2 cm ( \because 1 m = 100 cm) . \]
\[\text { Its volume = 600 } \times 6 \times 2 = 7200 {cm}^3 \]
\[\text { Now, 1 }{cm}^3 = 8 gm\]
\[i . e . , 7200 {cm}^3 = 7200 \times 8 gm = 57600 gm\]
\[ \therefore \text { Weight of the iron piece = 57600 gm }\]
\[ = 57600 \times \frac{1}{1000}kg ( \because 1 Kg = 1000 gm)\]
\[ = 57 . 6 kg\]
APPEARS IN
संबंधित प्रश्न
The weight of a metal block of size 5 cm by 4 cm by 3 cm is 1 kg. Find the weight of a block of the same metal of size 15 cm by 8 cm by 3 cm.
A swimming pool is 20 m long 15 m wide and 3 m deep. Find the cost of repairing the floor and wall at the rate of Rs 25 per square metre.
If V is the volume of a cuboid of dimensions a, b, c and S is its surface area, then prove that \[\frac{1}{V} = \frac{2}{S}\left( \frac{1}{a} + \frac{1}{b} + \frac{1}{c} \right)\]
The dimensions of a cinema hall are 100 m, 50 m and 18 m. How many persons can sit in the hall, if each person requires 150 m3 of air?
Three equal cubes are placed adjacently in a row. The ratio of the total surface area of the resulting cuboid to that of the sum of the surface areas of three cubes, is
A closed box is cuboid in shape with length = 40 cm, breadth = 30 cm and height = 50 cm. It is made of a thin metal sheet. Find the cost of metal sheet required to make 20 such boxes, if 1 m2 of metal sheet costs Rs. 45.
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?
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 length breadth and height of a cuboid are in the ratio of 3 : 3 : 4. Find its volume in m3 if its diagonal is `5sqrt(34)"cm"`.
