Surface Area of Cube, Cuboid and Cylinder

A cubical box has each edge $10 \mathrm{cm}$ and another cuboidal box is $12.5 \mathrm{cm}$ long, $10 \mathrm{cm}$ wide and $8 \mathrm{cm}$ height. Which box has the greater lateral surface area and by how much?

A cubical box has each edge $10 \mathrm{cm}$ and another cuboidal box is $12.5 \mathrm{cm}$ long, $10 \mathrm{cm}$ wide and $8 \mathrm{cm}$ height. Which box has the greater lateral surface area and by how much?

A cubical box has each edge $10 \mathrm{cm}$ and another cuboidal box is $12.5 \mathrm{cm}$ long, $10 \mathrm{cm}$ wide and $8 \mathrm{cm}$ height. Which box has the smaller total surface area and by how much?

Swetha cake shop was placing an order for making cardboard boxes for packing their cakes. Two sizes of boxes were required. The bigger box of dimensions $25 \mathrm{cm}\times 20 \mathrm{cm}\times 5 \mathrm{cm}$ and the smaller box of dimensions $15 \mathrm{cm}\times 12 \mathrm{cm}\times 5 \mathrm{cm}$. For all the overlaps, $5\%$ of the total surface area is required extra. If the cost of the cardboard is $₹4$ for $1000 {\mathrm{cm}}^2$, find the cost of cardboard required for supplying $250$ boxes of each kind.

The sum of the two radii is 14 cm. What is the value of the external radius?

The total surface area of the cylinder is 2640 sq cm and the sum of the external and internal radii is 14 cm. If the height of the cylinder is 28 cm, what is the difference between the two radii of the cylinder?

The ratio between the curved surface area and the total surface area of a right circular cylinder is

1 : 3. What is the ratio between the height of the cylinder and the radius of the cylinder?

The total surface area of a solid cylinder whose radius is r and height h is equal to

In the figure below,

(1) The radius of cylinder A is half that of cylinder B.

(2) The height of cylinder B is half that of cylinder A.

Which of the following is correct about their surface areas?

This is the Children’s Factory half cylinder foam block which is used in soft play patchwork puzzles. If the radius of the foam block is r and the height of the block is h, then what is the total surface area of the foam block?

A candle mould has a circumference of $10\mathrm{\pi } \mathrm{cm}$ and a height of $20 \mathrm{cm}$. The candle which will be made out of this will have the surface area of _____${\mathrm{\pi cm}}^3.$

The diameter of an Indian 2 rupee coin is 26 mm and thickness is 1 mm.

The area of the coin to be polished is _____ sq mm.

(Take $ \pi =\frac{22}{7})$