Sphere

Identify the given shape and find its curved surface area if $r_1=2 \mathrm{cm}$ and $r_2=5 \mathrm{cm}$.

The outer radius of a hollow hemisphere is $14 \mathrm{cm}$ and its inner radius is $7 \mathrm{cm}$. Find the curved surface area of the hollow hemisphere.

Explain in detail about the shape of a sphere and find the surface area of a sphere whose radius is $3$ units.

If the surface area of a sphere is$\left(144\mathrm{\pi }\right) {\mathrm{m}}^2$ then its volume is

The volume of sphere is $38808 {\mathrm{cm}}^3$. Its curved surface area is [Use $\mathrm{\pi }=\frac{22}{7}$]

The hemisphere has only one surface which is flat.

The hemisphere has one curved surface and one flat surface.

The surface of a hemisphere is curved.

A hemisphere has two surfaces.

How many surface does a hemisphere have?

The curved surface area of a hemisphere with radius $1 \mathrm{cm}$ is

The volume of a hemisphere of radius $3 \mathrm{cm}$ is 

The surface area of a sphere of radius $7 \mathrm{cm}$ is

The radius of a semi-sphere is $7 \mathrm{cm}$, find the total surface area of it(in ${\mathrm{cm}}^2$).

In a hemispherical bowl of $2.1 \mathrm{cm}$ radius ice-cream is there. Find the volume of the bowl (in ${\mathrm{cm}}^3$), correct to three decimal places. [Assume $\mathrm{\pi }=\frac{22}{7}$]

The total surface area of a hemisphere is

A solid metallic hemisphere has diameter $42 \mathrm{cm}$. If the total cost of polishing the total surface at the rate $20$ paise per ${\mathrm{cm}}^2$ is $₹k$, then find the value of $k.$

Which of the following is the formula for the volume of a sphere of radius ‘r’?

Rohan dropped 10 identical steel balls into a cylindrical container of radius 6 cm and the level of water in the container rose from 14 cm to 24 cm.

What is the volume of one steel ball?

Rohan dropped 10 steel balls into a cylindrical container of radius ‘r’ cm and the level of water in the container rose from $ {h}_{1}$ cm to $ {h}_{2}$ cm.

Which of these formulae gives the volume of 10 steel balls?