Surface Area of a Sphere

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 $k$. $\left(\mathrm{Use} \mathrm{\pi }=\frac{22}{7}\right)$

If the surface area of sphere of radius $5.6 \mathrm{cm}$ is $k {\mathrm{cm}}^2$. 

Then find the value of $k$.

$\left(\mathrm{Use} \mathrm{\pi }=\frac{22}{7}\right)$

If the surface area $\left(\mathrm{in} {\mathrm{cm}}^2\right)$ of sphere of radius $10.5 \mathrm{cm}$ is $k {\mathrm{cm}}^2$, find $k$ $\left(\mathrm{Use} \mathrm{\pi }=\frac{22}{7}\right)$.

A wooden toy is in the form of cone surmounted on a hemisphere. The diameter of the base of the cone is $16 cm$ and its height is $15 \mathrm{cm}$. Find the cost of painting the toy at Rs.$7$ per $100 {\mathrm{cm}}^2$.

Eight spheres of same radius are formed from a metallic sphere of radius $10 \mathrm{cm}$. If the surface area of each sphere is $A\pi$ ${\mathrm{cm}}^2$, find $A$.

Find the surface area of a sphere in ${\mathrm{cm}}^2$, whose volume is $38808 {\mathrm{cm}}^3$.

Find the surface area and volume of a sphere of radius $1.4 \mathrm{cm}$.

A hemispherical dome of a building needs to be painted. If the circumference of the base of the dome is $17.6 \mathrm{m}$ and the cost of painting it is $₹k$, given the cost of painting is $₹5$ per $100 \mathrm{c}{\mathrm{m}}^2$, then find the value of $k$. $\left[\text{Take} \mathrm{\pi }=\frac{22}{7}\right]$