Advertisements
Advertisements
प्रश्न
The length of a hall is double its breadth. Its height is 3 m. The area of its four walls (including doors and windows) is 108 m2, find its volume.
Advertisements
उत्तर
Let the breadth be x
and the length be 2x
Height = 3 m
Area of four walls = 108 m2
⇒ 2(l + b)h = 108
⇒ 2(2x + x)3 = 108
⇒ `6 xx 3x = 108`
⇒ `3x = 108/6`
⇒ `x = 18/3 = 6`m
∴ Breadth = x = 6 m
and length = 2x = 12 m
Hence, Volume = `l xx b xx h`
= `12 xx 6 xx 3`
= 216 m3
APPEARS IN
संबंधित प्रश्न
If each edge of a cube is doubled, how many times will its surface area increase?
Find the volume of a cube whose side is 4 cm .
A cube A has side thrice as long as that of cube B. What is the ratio of the volume of cube A to that of cube B?
Three cubes whose edges measure 3 cm, 4 cm, and 5 cm respectively are melted to form a new cube. Find the surface area of the new cube formed.
The volume of a cube is 729 cm3. Find its total surface area.
The square on the diagonal of a cube has an area of 1875 sq. cm. Calculate:
(i) The side of the cube.
(ii) The total surface area of the cube.
Each face of a cube has a perimeter equal to 32 cm. Find its surface area and its volume.
Three metal cubes with edges 6cm, 8cm and 10cm respectively are melted together and formed into a single cube. Find the diagonal of this cube.
Three cubes of sides x cm, 8cm and 10cm respectively are melted and formed into a single cube of edge 12cm, Find 'x'.
A cube of side 4 cm is cut into 1 cm cubes. What is the ratio of the surface areas of the original cubes and cut-out cubes?
