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This mock test of RD Sharma Test: Surface Area & Volumes for Class 10 helps you for every Class 10 entrance exam.
This contains 25 Multiple Choice Questions for Class 10 RD Sharma Test: Surface Area & Volumes (mcq) to study with solutions a complete question bank.
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students definitely take this RD Sharma Test: Surface Area & Volumes exercise for a better result in the exam. You can find other RD Sharma Test: Surface Area & Volumes extra questions,
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QUESTION: 1

The cost of painting a cubical box of side 3m at the rate of Rs.2 per sq.m is

Solution:

Given: Side of the cube (a) = 3 m

∴ Surface Area of Cube = 6a^{2} = 6 x 3 x 3 = 54 sq. cm

Now, Cost of painting the cubical box of 1 sq. m = Rs. 2 .

∴ Cost of painting the cubical box of 54 sq. m = 54 x 2 = Rs. 108

QUESTION: 2

The volume of the cuboid whose length, breadth and height is 12cm, 8cm and 6cm is

Solution:

Volume of cuboid = Length x Breadth x Height

⇒ V = 12 x 8 x 6 = 576 cu. cm

QUESTION: 3

The base area of the cylinder is 80 sq.cm. If its height is 5cm, then its volume is

Solution:

Base area of the cylinder = 80s.q cm

Now, Volume of the cylinder =

QUESTION: 4

A cubical block of side 7 cm is surmounted by a hemisphere. The greatest diameter of the hemisphere is

Solution:

It is clear that Maximum diameter of hemisphere can be the side of the cube.

∴ Greatest diameter of the hemisphere = 7 cm

QUESTION: 5

The plural form of ‘frustum’ is

Solution:

The plural form of ‘frustum’ is frusta.

QUESTION: 6

A solid cylinder of radius ‘r’ and height ‘h’ is placed over other cylinder of same height and radius. The total surface area of the shape so formed is

Solution:

Here,

TSA of new shape = 2πrh + 2πrh+ πr^{2}

= 4πrh + 2πr^{2 }

QUESTION: 7

The edge of the cube whose volume is 1728cm is

Solution:

Given : Volume of cube = 1728 cm

QUESTION: 8

The radius and height of a right circular cone and that of a right circular cylinder are respectively equal. If the volume of the cylinder is 300 cu.cm, then the volume of the cone is

Solution:

Let Radius and height of the cone be r and h respectively and Radius and height of the right circular cylinder be R and H.

QUESTION: 9

A solid is in the shape of a cone standing on a hemisphere with both their radii being equal to 1cm and the height of the cone is equal to its radius. The volume of the solid is

Solution:

Radii of cone and hemisphere = r = 3 cm

Height of cone (h) = 1 cm

Volume of solid = Volume of cone + Volume of hemisphere

QUESTION: 10

The length of the diagonal of a cuboid of dimensions 5cm by 4cm by 3cm is

Solution:

Length of the diagonal of cuboid

QUESTION: 11

If two solid hemispheres of same base radius ‘x’ cm are joined together along their bases, then the CSA of the new solid formed is

Solution:

If two solid hemispheres of same base radius ‘x’ cm are joined together along their bases, then the CSA of the new solid formed is 4πr^{2} = 4πx^{2}.

QUESTION: 12

The volumes of two spheres are in the ratio 125 : 64. The ratio of their surface areas is

Solution:

Let r_{1} and r_{2} be the radius of the two spheres respectively. Therefore, the ratio of their surface areas,

QUESTION: 13

If the surface area of a sphere is 36π sq. cm, then its volume is

Solution:

Given: Surface area of sphere = 36πr sq. cm

∴ Volume of sphere =

QUESTION: 14

A frustum of a cone is of height 12cm with radii of its circular ends as 2cm and 4cm. The volume of the frustum is

Solution:

QUESTION: 15

The longest rod that can be placed inside the cube is

Solution:

The longest rod that can be placed inside the cube is √3 times the edge of the cube, i.e., √3 edge

QUESTION: 16

If the surface area of the sphere is same as the CSA of a right circular cylinder whose height and diameter are 12cm each, then the radius of the sphere is

Solution:

Let the radius of solid sphere be rr cm and radius of solid cylinder be R cm. Then according to question,

QUESTION: 17

If the volume of a cube is 343 cm , then its edge is

Solution:

QUESTION: 18

The inner dimensions of a closed box are 12cm, 10cm and 8cm. If the thickness of the wood is 1cm, then the capacity f the box is

Solution:

Given: l = 12 cm, b = 10 cm and h = 8 cm

∴ Capacity of a closed box = lbh = 12 x 10 x 8 = 960 cm. cm

Capacity of box of thickness 1 cm = 960/1 = 960 cu. cm

QUESTION: 19

A funnel is the combination of

Solution:

A funnel is the combination of a frustum of a cone and a cylinder.

QUESTION: 20

A plumbline is combination of

Solution:

A plumbline is combination of a hemisphere and a cone

QUESTION: 21

A rectangular piece of paper is 44cm long and 18cm wide. If a cylinder is formed by rolling the paper along its length, then the radius of the base of the cylinder is

Solution:

Let r be the radius of the cylinder. Given: Circumference of cylinder = 44 cm

QUESTION: 22

The surface areas of two spheres are in the ratio 16 : 9. The ratio of their volumes is

Solution:

Let r_{1} and r_{2} be the radius of the two spheres respectively. Therefore. the ratio of their volumes.

Now, ratio of thier volumes,

QUESTION: 23

During conversion of a solid from one shape to another, the volume of the new shape will

Solution:

During conversion of a solid from one shape to another, the volume of the new shape will remain unaltered.

QUESTION: 24

The shape of a glass tumbler is usually in the form of

Solution:

The shape of a glass tumbler is usually in the form of frustum of a cone.

QUESTION: 25

A cylindrical pencil sharpened at one edge is the combination of

Solution:

A cylindrical pencil sharpened at one edge is the combination of a cone and a cylinder.

### NCERT Textbook: Surface Area & Volumes

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