MEDIUM
9th CBSE
IMPORTANT
Earn 100

A hollow sphere of external and internal diameters 8 cm and 4 cm respectively is melted into a cone of base diameter 8cm. Find the height of the cone.

Important Questions on Surface Areas and Volumes

MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 13
How many spherical bullets can be made out of a solid cube of lead whose edge measures 44 cm, each bullet being 4 cm in diameter?
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 14
The largest sphere is carved out of a cube of side 10.5cm. Find the volume of the sphere.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 15
A hemispherical bowl of internal diameter 36 cm  contains some liquid. This liquid is to be filled into cylinderical shaped bottles each of diameter 6 cm and height 6 cm. Find the number of bottles necessary to empty the bowl.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 16
A hemispherical tank is made up of an iron sheet 1 cm thick. If the inner radius is 1 m, then find the volume of iron used to make the tank.
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 17
The radii of two sphere are in the ratio 1:2. Find the ratio of their surface areas.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 18
The volumes of the two sphere are in the ratio 64:27. Find the ratio of their surface areas.
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 19
A spherical hall of radius 3 cm is melted and recast into three spherical balls. The radii of two of these balls are 1.5 cm and 2 cm. Find the radius of the third hall.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 20
A cube of side 4 cm contains a sphere touching its sides. Find the volume of the gap in between.