Surface Area of a Sphere

The surface area of a sphere is $394.24 {\mathrm{cm}}^2$. If its radius is decreased by $25\%$what will be the decrease in its surface area?

The surface area of sphere is $576\mathrm{\pi } {\mathrm{cm}}^2$, find its volume.

If the surface area of a sphere of radius $r$ is decreased by $19\%$ and the radius of the new sphere is $r_1$, then find the ratio of $r_1$ to $r$

The area of sheet required to cover a hemispherical bowl of radius $20 \mathrm{cm}$ is:

The outer and inner surface area of a hemispherical bowl are $1152\pi {\mathrm{cm}}^2$ and $648\pi {\mathrm{cm}}^2$ respectively. What is the total surface area of the bowl?

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

Explain the shape of a sphere and find the volume of a sphere whose radius is $3$ units.

Find the total surface area of a hemisphere of radius $18$ cm. [Use, $\mathrm{\pi }=3.14$]

Find the total surface area of a hemisphere of radius $10$ cm. [Use, $\mathrm{\pi }=3.14$]

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?

If the total surface area of a hemisphere of radius $10 \mathrm{c}\mathrm{m}$ is $A {\mathrm{cm}}^2$, then find the value of $A$.(Use $\mathrm{\pi }=3.14$)

In the diameter a hemispherical igloo is given. Its outer radius is $200 \mathrm{cm}$. Its total surface area is _____ $\mathrm{\pi }$ ${\mathrm{cm}}^2$

If the surface area of a sphere of diameter equal to square root of $12$ is $A\pi$. Find $A$

Find the value of $a$ if the total surface area of a hemisphere of radius $10 \mathrm{cm}$ is $a {\mathrm{cm}}^2$. $\left(\mathrm{Use} \mathrm{\pi }=3.14\right)$

If the surface area of a sphere of diameter $3.5 \mathrm{m}$ is $k \mathrm{m}{ }^2$, find the value of $k$. $\left(\mathrm{Use} \mathrm{\pi }=\frac{22}{7}\right)$

If the surface area of sphere of radius $14 \mathrm{cm}$ is $k {\mathrm{cm}}^2$, find the value of $k$. $\left(\mathrm{Use} \mathrm{\pi }=\frac{22}{7}\right)$