Identify the wrong statement of the following:

The number of edges of a cube are

If the edges of a cuboid are l, b and h respectively, then the total surface area of the cuboid is

The area of the four walls of a room is 300 m². Its length and height are 15 m and 6 m respectively. Find its breadth. 

The area of the four walls of a room is 80 cm² and its height is 4 m. Then, the perimeter of the floor of the room is

If the length of the diagonal of a cube is \(6\sqrt { 3 } \) cm, find the edge of the cube.

The length, breadth, and height of a cuboid are 15 cm, 10 cm, and 20 cm. Find the surface area of the cuboid.

The surface area of a cuboid is 1372 cm².If its dimensions are in the ratio 4: 2: 1, find its length.

A solid cylinder has a total surface area 462 cm². Its curved surface area is one-third of the total surface area. Find the height of the cylinder.

The paint in a certain container is sufficient to paint an area equal to 9.375 m². How many bricks of dimensions 22.5 cm \(\times\) 10 cm \(\times\) 7.5 cm can be painted out of this container?

A small indoor greenhouse (her-barium) is made entirely of glass panes (including base) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high.
(i) What is the area of the glass?
(ii) How much of tape is needed for all the 12 edges?

The inner diameter of a circular well is 3.5 m. It is 10 m deep. Find
(i) its inner curved surface area,
(ii) the cost of plastering this curved surface at the rate of Rs 40 per m². 

Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.

Find the surface area of sphere of radius:
(i) 10.5 cm            
(ii) 5.6 cm
(iii) 14 cm.

The dimensions of a rectangular box are in the ratio of 2 : 3 : 4 and the difference between the cost of covering it with sheet of paper at the rates of Rs 8 and Rs 9.50 per m² is Rs 1248. Find the dimensions of the box.

10 cylindrical pillars of a building have to be painted. If the diameter of each pillar is 50 cm and the height 4 m, what will be the cost of painting at the rate of Rs 14 per square metre?

A farmer wants to dig a well either in the form of cuboidal shape of 1.5 m \(\times\) 1.5 m \(\times\)7 m or in the cylindrical shape of radius 75 cm and height 7 m. the rate of digging a well in Rs 75/m³. the farmer decided to dig cylindrical form of well.
(a) Calculate the cost to dig the well in both cases. \(\left( use\ \pi =\frac { 22 }{ 7 } \right) \)
(b) by the decision what value is depicted by the farmer?

A cone of height 24 cm has a curved surface area 550 cm². Find us volume.

Two solid spheres made of the same metal have masses 5920 g of and 740 g respectively. Determine the radius of the larger sphere, if the diameter of the smaller sphere is 5 cm.