Advertisements
Advertisements
Question
What will be the height of a cuboid of volume 168 m3, if the area of its base is 28 m2?
Advertisements
Solution
\[\text { Volume of the cuboid = 168 } m^3 \]
\[\text { Area of its base = 28 } m^2 \]
\[\text { Let h m be the height of the cuboid } . \]
\[\text{ Now, we have the following: } \]
\[\text { Area of the rectangular base = lenght } \times \text { breadth }\]
\[\text { Volume of the cuboid = lenght }\times\text { breadth } \times \text { height }\]
\[ \Rightarrow \text { Volume of the cuboid = (area of the base) } \times \text { height }\]
\[ \Rightarrow 168 = 28 \times h\]
\[ \Rightarrow h = \frac{168}{28} = 6 m\]
\[ \therefore\text { The height of the cuboid is 6 m } .\]
RELATED QUESTIONS
Parveen wanted to make a temporary shelter for her car, by making a box-like structure with tarpaulin that covers all the four sides and the top of the car (with the front face as a flap which can be rolled up). Assuming that the stitching margins are very small, and therefore negligible, how much tarpaulin would be required to make the shelter of height 2.5 m, with base dimensions 4 m × 3 m?
Each edge of a cube is increased by 50%. Find the percentage increase in the surface area of the cube.
A wooden bookshelf has external dimensions as follows: Height = 110 cm, Depth = 25 cm, Breadth = 85 cm in following figure. The thickness of the plank is 5 cm everywhere. The external faces are to be polished and the inner faces are to be painted. If the rate of polishing is 20 paise per cm2 and the rate of painting is 10 paise per cm2. Find the total expenses required for polishing and painting the surface of the bookshelf.

How many planks each of which is 3 m long, 15 cm broad and 5 cm thick can be prepared from a wooden block 6 m long, 75 cm broad and 45 cm thick?
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?
Show that the product of the areas of the floor and two adjacent walls of a cuboid is the square of its volume.
The cost of preparing the walls of a room 12 m long at the rate of Rs 1.35 per square metre is Rs 340.20 and the cost of matting the floor at 85 paise per square metre is Rs 91.80. Find the height of the room.
The length of the longest rod that can be fitted in a cubical vessel of edge 10 cm long, is
A solid cube of edge 14 cm is melted down and recast into smaller and equal cubes each of the edge 2 cm; find the number of smaller cubes obtained.
Find the height of the cylinder whose radius is 7 cm and the total surface area is 1100 cm2.
