MEDIUM
9th CBSE
IMPORTANT
Earn 100

The diameter of a cylinder is 24 cm its height is 20 cm. It is filled with com flour powder. How many hemispherical cup of radius 3 cm are required if the entire com flour is filled in each hemispherical cup, fully.

Important Questions on Surface Areas and Volumes

HARD
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 6
A hemispherical dome of a building needs to be painted. If the circumference of the base of the dome is 17.6 m, find the cost of painting it. Given the cost of painting is ₹ 5 per 100 cm2.
HARD
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 7
Vinayak got a playing top (lattu) as his birthday present which surprisingly had no colour on it. He wanted to colour it with his crayons. The top is shaped like a cone surmounted by a hemisphere. The entire top is 5 cm in height and the diameter of the top is 3.5 cm. Find the area he has to colour.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 8
A boy has a spherical sweet of radius 4 cm. A girl has 8 spherical sweets each of radius 2 cm. Find the ratio of the volume of the sweets the boy has to the sweets the girl has.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 9
Surface area of a sphere of radius 5 cm is 5 times the area of the curved surface of a cone of radius 4 cm. Find the height of the cone.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 10
If the diameter of a sphere is decreased by 25% by what percent its curved surface of a cone of radius 4 cm. Find the height of the cone.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 11
The water for a factory is stored in a hemispherical tank whose internal diameter is 14 m. The tank contains 50 kilolitres of water. Water is pumped into the tank to fill to its capacity. Calculate the volume of water pumped into the tank.
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>EXERCISES>Q 12
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.
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?