Visualising Solid Shapes

Q.

Two dice are placed side by side as shown in the figure. What would be the sum of the numbers which are on the opposite faces of 5 and 6 respectively?

___

Q.

If three cubes of dimensions 3 cm by 3 cm by 3 cm are placed side by side, what would the dimensions of the resulting cuboid be?

1. 9 cm x 3 cm x 9 cm

2. 9 cm x 6 cm x 3 cm

3. 6 cm x 3 cm x 3 cm

4. 9 cm x 3 cm x 3 cm

Q.

The capacity of water jug is 500ml . The water level is 200ml below the top . Calculate the level of water in the jug.

Q. Question 7
The name of the given solid in the figure is

a) Triangular pyramid
b) Rectangular pyramid
c) Rectangular prism
d) Triangular prism

Q. Name the solid that would be formed by each net:

Q.

Number of faces in a cube is

1. 4

2. 8

3. 6

4. 12

Q.

Three cubes each of dimension 3 x 3 x 3 cm are placed side by side. The dimensions of the resulting figure obtained will be

1. 3 x 3 x 9 cm

2. 6 x 6 x 6 cm

3. 3 x 6 x 9 cm

4. 9 x 9 x 9 cm

Q.

Question 12
Total number of edges a cylinder has

a) 0

b) 1

c) 2

d) 3

Q.

Question 89

State whether the statement is True or False.

The top and bottom faces of a kaleidoscope are congruent.

Q. Question 85

In the given figure, if only the shaded cubes are visible from the top, draw the base layer.

Q.

The measurements of some cuboids are as follows. (Complete the given table).

Q.

Consider the figure of an opened die given below:

What is the value of A?

___

Q.

Out of __________ faces of a triangular prism, __________are rectangles and __________ are triangles.

Q.

Consider the figure of an opened die given below:

What is the value of B?

___

Q. (a) Are sphere, cone and cylinder polyhedrons? Give reason for your answer.

(b) Match the 2-D figures with their names.


[4 MARKS]

Q. is a polyhedron.

1. A Ball
2. A Glass tumbler
3. A Brick

Q. If three cuboids of dimension 3cm x 3cm x 4cm are stacked on top of each other, what will be the dimensions of new cuboid formed?

1. 9cm x 3cm x 4cm
2. 3cm x 3cm x 12cm
3. 3cm x 9cm x 2cm
4. 9cm x 9cm x 12cm

Q.

The dimension of following cuboid is:

1. 5 units x 3 units x 2 units

2. 2 units x 1 unit x 2 units

3. 2 units x 2 units x 2 units

4. 1 unit x 1 unit x 1 unit

Q.

Two dice are placed side by side as shown in the figure. What would be the sum of the numbers which are on the opposite faces of 4 and 3 respectively?

___

Q.

The name of the given solid in figure is

Fig. 12.17

Q. Some of the measures of certain cuboids are given below. Use them to complete the table.

S. No	(1)	(2)	(3)	(4)	(5)	(6)
Length	7 cm	15 cm	−	3.5 cm	4.8 m	−
Width	5 cm	10 cm	12 cm	−	3.5 m	1.6 m
Height	3 cm	4 cm	8 cm	2 cm	−	0.5 m
Volume	−	−	1920 cu cm	21 cu cm	42 cu m	2 cu m

Q. The solid obtained by rotating a right triangle about its height is ____ .

1. sphere
2. cuboid
3. cone
4. cylinder

Q.

Which of the following solids are pyramids?

1. Cube

2. Tetrahedron

3. Cone

4. Cylinder

Q.

With reference to fig. 12.19:

(i) Write the names of the edges of the solid.

Q.

All the three dimensions shown in the figure above are equal. It is called cuboid.

1. True

2. False

Q. 2 cubes of dimension 2 cm are placed side by side, what would be the dimension of the resulting cuboid ?

Q.

The dimensions of following cuboid are:

1. 6 units x 3 units x 2 units

2. 5 units x 3 units x 3 units

3. 3 units x 3 units x 6 units

4. 6 units x 4 units x 4 units

Q. The area of the 4 walls of a room is 168 m². The breadth and height of the room are 10 m and 4 m respectively. Find the length of the room.

Q. The sides of some cubes are given below. Find their volume.

(1) 26 cm
(2) 2.6 cm
(3) 3.9 cm
(4) 12.5 cm
(5) 13.2 cm
(6) 24.3 cm
(7) 9.7 cm
(8) 10.3 cm

Q. If two cubes of dimensions 3 cm by 3 cm by 3 cm are placed side by side, then the resulting dimension of the cuboid is length (l), breadth (b) and height (h). Find the value of l+b+h (in cm).​