Sphere and Hemisphere

Q. The ratio of the total surface area of a sphere to that of a hemisphere when they have the same radius is

1. 4:3
2. 3:4
3. 3:2

Q.

The radius of a hemisphere having total surface area of 1848 sq. cm is 7 cm

1. True

2. False

Q.

A sphere and a hemisphere have same total surface area. Find the ratio of their radii i.e.$\frac{r_1}{r_2}$, where $r_1$ and $r_2$ are the radii of sphere and hemisphere respectively.

1. $\frac{\sqrt{3}}{2}$

2. 1

3. $\frac{3}{2}$

4. $\frac{\sqrt{3}}{4}$

Q.

A sphere and a hemisphere have same total surface area. Find the ratio of their radii i.e.$\frac{r_1}{r_2}$, where $r_1$ and $r_2$ are the radii of sphere and hemisphere respectively.

1. 1

2. $\frac{3}{2}$

3. $\frac{\sqrt{3}}{4}$

4. $\frac{\sqrt{3}}{2}$

Q. The total surface areas of two hemispheres are in the ratio 1:4. Find the ratio of their volumes.
[2 Marks]

Q.

The radius of a hemisphere having total surface area of $1848c{m}^2$ is $7cm$

1. False

2. True

Q.

A sphere and a hemisphere have same total surface area. Find the ratio of their radii i.e.$\frac{r_1}{r_2}$, where $r_1$ and $r_2$ are the radii of sphere and hemisphere respectively.

1. 1

2. $\frac{3}{2}$

3. $\frac{\sqrt{3}}{4}$

4. $\frac{\sqrt{3}}{2}$

Q. The radius of a hemisphere having a total surface area of 1848 sq. cm is ___

Q. Find the curved surface area of a hemisphere whose radius is 7 cm.

1. $308c{m}^2$
2. $318c{m}^2$
3. $388c{m}^2$
4. $368c{m}^2$

Q.

A sphere and a hemisphere have same total surface area. Find the ratio of their radii i.e.$\frac{r_1}{r_2}$, where $r_1$ and $r_2$ are the radii of sphere and hemisphere respectively.

1. 1

2. $\frac{3}{2}$

3. $\frac{\sqrt{3}}{4}$

4. $\frac{\sqrt{3}}{2}$

Q. Find the curved surface area of a hemisphere whose radius is 7 cm.

1. $308c{m}^2$
2. $318c{m}^2$
3. $388c{m}^2$
4. $368c{m}^2$