Listen NCERT Audio Books to boost your productivity and retention power by 2X.
A cuboidal box is 5 cm by 5 cm by 4 cm. Find its surface area.
Dimensions of cuboidal box = 5cm × 5cm × 4cm
Surface area of cuboid =
Find the surface area of a cuboid whose
(i) length = 10 cm, breadth = 12 cm, height = 14 cm
(ii) length = 6 dm, breadth = 8 dm, height = 10 dm
(iii) length = 2m, breadth = 4 m, height = 5 m
(iv) length = 3.2 m, breadth = 30 dm, height = 250 cm.
Find the surface area of a cube whose edge is
(i) 1.2 m
(ii) 27 cm
(iii) 3 cm
(iv) 6 m
(v) 2.1 m
Find the surface area of a cube whose volume is
(i) 343 m3
(ii) 216 dm3
Find the volume of a cube whose surface area is
(i) 96 cm2
(ii) 150 m2
The dimensions of a cuboid are in the ratio 5 : 3 : 1 and its total surface area is 414 m2. Find the dimensions.
Find the area of the cardboard required to make a closed box of length 25 cm, 0.5 m and height 15 cm.
Find the surface area of a wooden box whose shape is of a cube, and if the edge of the box is 12 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.
A classroom is 11 m long, 8 m wide and 5 m high. Find the sum of the areas of its floor and the four walls (including doors, windows etc.)
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.
The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.
Show that the product of the areas of the floor and two adjacent walls of a cuboid is the square of its volume.
The walls and ceiling of a room are to be plastered. The length, breadth nad height of the room are 4.5 m, 3 m and 350 cm, respectively. Find the cost of plastering at the rate of Rs. 8 per square metre.
A cuboid has total surface area of 50 m2 and lateral surface area os 30 m2. Find the area of its base.
A classroom is 7 m long, 6 m broad and 3.5 m high. Doors and windows occupy an area of 17 m2. What is the cost of white washing the walls at the rate of Rs. 1.50 per m2.
The central hall of a school is 80 m long and 8 m high. It has 10 doors each of size 3 m ×1.5 m and 10 windows each of size 1.5 m× 1 m. If the cost od white washing the walls of the hall at the rate of Rs. 1.20 per m2 is Rs. 2385.60, find the breadth of the hall.