Advertisements
Advertisements
Question
What will happen to the volume of a cuboid if its Length is doubled, height is doubled and breadth is sama?
Advertisements
Solution
\[\text { Suppose that the length, breadth and height of the cuboid are l, b and h, respectively } . \]
\[\text { Then, volume }= l \times b \times h\]
\[\text { When its length is doubled, its length becomes 2 }\times l . \]
\[\text { When its height is double, it becomes 2 } \times h . \]
\[\text { The breadth b remains the same } . \]
\[\text { Now, volume of the new cuboid = length } \times \text { breadth }\times \text { height }\]
\[ = 2 \times l \times b \times 2 \times h\]
\[ = 4 \times l \times b \times h\]
\[ \therefore\text { It can be observed that the volume of the new cuboid is four times the initial volume }.\]
APPEARS IN
RELATED QUESTIONS
The length and breadth of a hall are in the ratio 4: 3 and its height is 5.5 metres. The cost of decorating its walls (including doors and windows) at Rs. 6.60 per square metre is Rs. 5082. Find the length and breadth of the room.
Find the surface area of a cuboid whose length = 10 cm, breadth = 12 cm, height = 14 cm.
Find the area of the cardboard required to make a closed box of length 25 cm, 0.5 m and height 15 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.
If each edge of a cuboid of surface area S is doubled, then surface area of the new cuboid is
The dimensions of a Cinema Hall are 100 m, 60 m, and 15 m. How many persons can sit in the hall if each requires 150 m3 of air?
The breadth and height of a rectangular solid are 1.20 m and 80 cm respectively. If the volume of the cuboid is 1.92 m3; find its length.
The total surface area of a cube is 216 cm2. Find its volume.
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.
375 persons can be accommodated in a room whose dimensions are in the ratio of 6 : 4 : 1. Calculate the area of the four walls of the room if the each person consumes 64m3 of air.
