The outer radius of a hollow hemisphere is double the inner radius and the curved surface area is $396 {\mathrm{cm}}^2$. Find the outer radius and inner radius of the hollow hemisphere.

Find the total surface area of a hollow hemisphere whose outer and inner radii are $4.2$cm and $2.1$cm respectively

The volume a hollow hemisphere is $2500 {\mathrm{cm}}^3$ and the outer radius of a hollow hemisphere is $12 \mathrm{cm}$. Find the inner radius of the hollow hemisphere in centimeters.

Write your answer up to two decimal points and consider $\mathrm{\pi }=\frac{22}{7}$.

The outer radius of a hollow hemisphere is $8 \mathrm{cm}$ and the inner radius of a hollow hemisphere is $5 \mathrm{cm}$. Find the volume of the hollow hemisphere in cubic centimeters.

Write your answer up to two decimal points and consider $\mathrm{\pi }=\frac{22}{7}$.

Choose the correct answer:

If the curved surface area of a hemisphere is $308 sq. cm$, then its diameter will be _____.

The volume a hollow hemisphere is $1000 {\mathrm{cm}}^3$ and the outer radius of a hollow hemisphere is $10 \mathrm{cm}$. Find the inner radius the hollow hemisphere in centimeters.

Write your answer up to two decimal points and consider $\mathrm{\pi }=\frac{22}{7}$.

The outer radius of a hollow hemisphere is $10 \mathrm{cm}$ and inner radius of a hollow hemisphere is $6 \mathrm{cm}$. Find the volume of the hollow hemisphere in cubic centimeters.

Write your answer up to two decimal points and consider $\mathrm{\pi }=\frac{22}{7}$.

The volume a hollow hemisphere is $3500 {\mathrm{cm}}^3$ and the outer radius of a hollow hemisphere is $15 \mathrm{cm}$. Find the inner radius of the hollow hemisphere in centimeters.

Write your answer up to two decimal points and consider $\mathrm{\pi }=\frac{22}{7}$.