Recent questions tagged class9

Three cubes each of side ‘a’ are joined from end to end to form a cuboid.The volume of the new cuboid is (11)

asked Aug 27, 2015 by pady_1

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The volume of a cuboid is 440 cm3. The area of its base is 66 cm2. Whatis its height(7)

asked Aug 27, 2015 by pady_1

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A wooden article was made by scooping out a hemisphere from each ends of a solid cylinder. If the height of the cylinder is 20cm, and radius of the base is 3.5cm , find the total surface area of the article.

asked Aug 27, 2015 by pady_1

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The volume of a solid metallic sphere is $616cm^3$.its is melted and recast into a cone of height $28\;cm$. Find the diameter of the base of the cone so formed?

asked Aug 27, 2015 by pady_1

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The surface area of a solid metallic sphere is $616cm^2$. It is melted and recast into a cone of height $28\;cm$. Find the diameter of the base of the cone so formed.

asked Aug 27, 2015 by pady_1

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How many shots each having diameter 4.2 cm can be made from a cuboidal lead solid of dimensions 66cm $\times$ 42cm $\times$ 21cm?

asked Aug 27, 2015 by pady_1

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Three metallic solid cubes whose edges are 3cm, 4cm, and 5cm are melted and converted into a single cube .Find the edge of the cube so formed?

asked Aug 27, 2015 by pady_1

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How many spherical lead shots each having diameter 3cm can be made from a cuboidal lead solid of dimensions 9cm X 11cm X 12cm

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A cylinder, a cone and a hemisphere are of same base and of same height . Find the ratio of their volumes?

asked Aug 27, 2015 by pady_1

1 answer

The slant height of a frustum of a cone is 4 cm and the perimeter of its circular ends are18cm and 6cm. Find the curved surface area of the frustum

asked Aug 27, 2015 by pady_1

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A cubical ice cream brick of edge 22cm is to be distributed among some children by filling ice cream cones of radius 2cm and height 7cm up to its brim.how many children will get ice cream cones?

asked Aug 27, 2015 by pady_1

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Find the volume of the largest right circular cone that can be cut out from a cube of edge 4.2 cm?

asked Aug 27, 2015 by pady_1

1 answer

The height of a cone is 60 cm.A small cone is cut off at the top by a plane parallel to the base and its volume is $\large\frac{1}{64}$ th the volume of original cone. Find the height from the base at which the section is made?

asked Aug 27, 2015 by pady_1

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Find the volume of a hollow sphere of outer radius 9 cm and inner radius is 6 cm

asked Aug 27, 2015 by pady_1

1 answer

The radius of the base and slant height of a cone is 7 cm and 25 cm respectively. Find the volume of the cone.

asked Aug 27, 2015 by pady_1

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The volume of the hemisphere is 18\pi cm^3. what is the total surface area of the hemisphere?

asked Aug 27, 2015 by pady_1

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The radius of the base and the slant height of a cone is 5cm and 13 cm respectively. Find the volume of the cone .

asked Aug 27, 2015 by pady_1

1 answer

If the edge of a cube increases by 20% then find the percentage increase in its volume

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The radii of two spheres are 2 cm and 3 cm respectively. The ratio of their surface areas is

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The volume of a right circular cylinder is $448\pi cm^3$ and its slant height is 7 cm, Find the radius of its base.

asked Aug 27, 2015 by pady_1

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If a hemisphere and cylinder stands on equal bases, and have the same height. Find the ratio of their volumes.

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12000 cubic feet water is added to a pond that is 80 feet wide and 50 feet long. What is the rise in the water level?

asked Aug 27, 2015 by pady_1

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If radius of two hemispheres are in ratio 3:4, find the ratio of their volumes.

asked Aug 27, 2015 by pady_1

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If radius of two hemispheres are in ratio 3:5, find the ratio of their volumes.

asked Aug 27, 2015 by pady_1

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The radius of a cylinder is halved and the height is doubled. What is the area of the curved surface now compared to the previous surface area?

asked Aug 27, 2015 by pady_1

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If radius of a sphere is 2x, find its surface area.

asked Aug 27, 2015 by pady_1

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A sphere is just enclosed inside a cube of volume 84 cm3. Find the volume of the sphere.

asked Aug 27, 2015 by pady_1

1 answer

A sphere is just enclosed inside a cube of volume 24 cm3. Find the volume of the sphere.

asked Aug 27, 2015 by pady_1

1 answer

Find the volume of the biggest cone that can fit inside a cube of side 2 cm.

asked Aug 27, 2015 by pady_1

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A sphere and a cone have the same radii. If the volume of the sphere is one fourth of the volume of the cone, find the ratio of the cone's height and radius.

asked Aug 27, 2015 by pady_1

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A sphere is just enclosed inside a right circular cylinder. If volume of the sphere is 200 cm3, find volume of the gap between cylinder and sphere

asked Aug 27, 2015 by pady_1

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If the radii of two hemispheres are in ratio 5:3, find the ratio of their surface area.

asked Aug 27, 2015 by pady_1

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If the radius of a hemisphere is 2r, find its curved surface area.

asked Aug 27, 2015 by pady_1

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The volumes of the two spheres are in the ratio 64 : 27. Find the ratio of their surface areas,

asked Aug 27, 2015 by pady_1

2 answers

Mcdonalled provides colddrink to the consumer daily in a cylindrical glasses of radius 7 cm. If the glass is filled with Cocacola upto an height of 12 cm, find how many litres of cocacola is needed to serve 100 consumer?

asked Aug 27, 2015 by pady_1

2 answers

A cube of side 42 cm contains a sphere touching its sides. Find the volume of the gap in between?

asked Aug 27, 2015 by pady_1

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A right triangle with sides 3 cm, 4 cm and 5 cm is revolved about the side 3cm to form a cone.Which of these is false?

asked Aug 27, 2015 by pady_1

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Find the amount of water displaced by a solid spherical ball of diameter 4.2 cm, when it is completely immersed in water?

asked Aug 27, 2015 by pady_1

1 answer

A Home choclate maker has one spherical chocalate of radius 10cm. With the same amount of material, how many small sphere of choclates of radius 2.5 cm can be made?

asked Aug 27, 2015 by pady_1

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The dimensions of a cuboid are 50 cm x 40 cm x 10 cm. Its volume in litres is:?

asked Aug 27, 2015 by pady_1

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In a cylinder, radius is doubled and height is doubled, curved surface area will be?

asked Aug 27, 2015 by pady_1

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The height of a cone is 16 cm and Slant height is 20 cm. Its radius is ?

asked Aug 27, 2015 by pady_1

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The area of three adjacent faces of a cube is a, b and c. The volume is V .What is the appropiate relation between V and a,b,c?

asked Aug 27, 2015 by pady_1

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If four times the sum of the areas of two circular faces of a cylinder of height 8cm is equal to the twice the curved surface area then find the diameter of the cylinder.

asked Aug 27, 2015 by pady_1

1 answer

If each edge of a cube is increased by 50% then what is the percentage increase in the surface area of the cube?

asked Aug 27, 2015 by pady_1

1 answer

if the height of a cylinder is doubled, by what number must the radius of the base be multiplied so that the resulting cylinder has the same volume as the original cylinder?

asked Aug 27, 2015 by pady_1

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A solid cylinder is melted and cast into a cone of same radius .Find the ratio of their heights ?

asked Aug 27, 2015 by pady_1

1 answer

The external and internal diameters of a hollow hemi-spherical vessel are 16cm and 12cm respectively the cost of painting 1 sq. cm of surface is Rs.2 .find the cost of painting the vessel?

asked Aug 27, 2015 by pady_1

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The radii of two cylindre are in ratio 2:3 and the ratio of their height 5:3, Find the ratio of their volume.

asked Aug 27, 2015 by pady_1

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the lateral surface area of a cube is 256 m^2 , The volume of the cube

asked Aug 27, 2015 by pady_1

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