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9th CBSE
IMPORTANT
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The radius of a sphere is 2r, then its volume will be

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Important Questions on Surface Areas and Volumes

HARD
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>MULTIPLE CHOICE QUESTIONS>Q 24
A cone is 8.4 cm high and the radius of its base is 2.1 cm. It is melted and recast into a sphere. The radius of the sphere is:
HARD
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>MULTIPLE CHOICE QUESTIONS>Q 25
The radii of two cylinders are in the ratio of 2:3 and their heights are in the ratio of 5:3. The ratio of their volume is:
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>TEST YOURSELF>Q 1
The surface area of a cuboid is 1372 sq. cm. If its dimensions are in the ratio of 4:2:1, then its length is:
EASY
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>TEST YOURSELF>Q 2
The base radius of a cone is 5 cm and its height is 12 cm. It slant height is
MEDIUM
9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>TEST YOURSELF>Q 3
The circumference of the base of a 8 m high conical tent is 2647 m. The area of canvas required to make the tent is :
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9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>TEST YOURSELF>Q 4
The number of litre of milk a hemispherical bowl of radius 10.5cm can hold is
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9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>TEST YOURSELF>Q 5
The radius of a sphere is 10 cm. If its radius is increased by 1 cm, the volume of the sphere is increased by
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9th CBSE
IMPORTANT
MATHEMATICS>Chapter 13 - Surface Areas and Volumes>TEST YOURSELF>Q 6
A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5 cm. Find the outer curved surface area of the bowl.