The volume of hemisphere of radius $3.5 \mathrm{cm}$ is

Important Questions on Surface Areas and Volumes

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 5

The radius and slant height of a cone are in the ratio of $4:7$. If its curved suriace area is $792 {\mathrm{cm}}^2$. Then, its radius is

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 6

The radius of a cone is $3 \mathrm{cm}$ and vertical height is $4 \mathrm{cm}$. Then, the area of the curved surface is

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 7

The volume of a sphere is $905\frac{1}{7} {\mathrm{cm}}^3$. Determine its diameter.

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 8

If surface area of a sphere is $676\pi {\mathrm{cm}}^2$, then find its radius.

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 9

The diameter and height of a right circular cone are $6 \mathrm{cm}$ and $7 \mathrm{cm}$, respectively. Find the volume of the right circular cone.

MEDIUM

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 10

If volume and surface area of a sphere is numerically equal, then find its radius.

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 11

How many square metres of canvas is required for a conical tent whose height is $3.5 \mathrm{m}$ and the radius of whose base is $12 \mathrm{m}$?

HARD

9th CBSE

IMPORTANT

All in One Mathematics>Chapter 11 - Surface Areas and Volumes>Exam Practice>Q 12

The radius of a spherical balloon is inflated from $1.5 \mathrm{cm}$ to $2.5 \mathrm{cm}$ by pumping more air in it. Find the ratio of surface area of resulting balloon to the original balloon.