Advertisements
Advertisements
Question
Side of a cube is 4.5 cm. Find the surface area of all vertical faces and total surface area of the cube.
Solution
Side of the cube, l = 4.5 cm
∴ Surface area of all vertical faces of the cube = 4l2
= 4 × (4.5 cm)2
= 4 × 20.25 cm2
= 81 cm2
Also,
Total surface area of the cube = 6l2
= 6 × (4.5 cm)2
= 6 × 20.25 cm2
= 121.50 cm2
Thus, the surface area of all the vertical faces and total surface area of the cube is 81 cm2 and 121.50 cm2, respectively.
APPEARS IN
RELATED QUESTIONS
Find the volume in cubic decimetre of the cube whose side is 2 dm 5 cm .
Fill in the blank in the following so as to make the statement true:
1 m3 = .........cm3
Find the surface area of a cube whose edge is 27 cm.
Find the length of 13.2 kg of copper wire of diameter 4 mm, when 1 cubic cm of copper weighs 8.4 gm.
The dimensions of a rectangular box are in the ratio 4: 2 : 3. The difference between the cost of covering it with paper at Rs. 12 per m2 and with paper at the rate of 13.50 per m2 is Rs. 1,248. Find the dimensions of the box.
The length of the diagonals of a cube is 8√3 cm.
Find its:
(i) edge
(ii) total surface area
(iii) Volume
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.
The lateral surface area of a cube of side 12 cm is
The volume of a cube is 64 cm3. Its surface area is ______.
The surface area of a cube formed by cutting a cuboid of dimensions 2 × 1 × 1 in 2 equal parts is 2 sq. units.
