Class 8 Mensuration CBSE Questions & Answers

Class 8 · Mensuration

This is Mathematics Class 8 Mensuration CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

Amount of region occupied by a solid is called its __________.

A
None of these
B
volume
Correct
C
surface area
D
area

The internal measures of a cuboidal room are \({\text{1}}0{\text{ m}} \times {\text{8 m}} \times {\text{4}}\) m. Find the total cost of whitewashing four walls of a room, if the cost of white washing is Rs 5 per \({{\text{m}}^{\text{2}}}\).

A
Rs 360
B
Rs 1540
C
None of these
D
Rs 720
Correct

Square and a rectangle have the same perimeter; if the side of the square is 16m and the length of the rectangle is 18 m, find the breadth of the rectangle.

A
12 m
B
10 m
C
14 m
Correct
D
16 m

A cylindrical container of radius 28 cm contains sufficient water to submerge a rectangular solid of dimensions \({\text{32 cm}} \times {\text{ 22 cm}} \times {\text{14 cm}}\). Find the rise in the level of water, when the solid is completely submerged.

A
8 cm
B
10 cm
C
4 cm
Correct
D
6 cm

A cylindrical tube, open at both ends is made of metal. The internal diameter of the tube is 10.4 cm and its length is 25 cm. The thickness of the metal is 8 mm everywhere. Calculate the volume of the metal in the cylinder.

A
None of these
B
704 \({\text{c}}{{\text{m}}^{\text{3}}}\)
Correct
C
704 cm
D
704 \({\text{c}}{{\text{m}}^{\text{2}}}\)

Find the area of the roads, if two roads are running in cross-section, through the middle of a ground.

A
3900 \({{\text{m}}^{\text{3}}}\)
B
3900 m
C
None of these
D
3900 \({{\text{m}}^{\text{2}}}\)
Correct

Find the area of a rhombus whose diagonals are of measurements 6 cm and 8 cm.

A
20 \({\text{c}}{{\text{m}}^{\text{2}}}\)
B
12 \({\text{c}}{{\text{m}}^{\text{2}}}\)
C
24 \({\text{c}}{{\text{m}}^{\text{2}}}\)
Correct
D
15 \({\text{c}}{{\text{m}}^{\text{2}}}\)

How many bricks will be required for a wall which is 8 m long, 6m high and 22.5 cm thick, if each brick measures \({\text{25 cm }} \times {\text{11}}.{\text{25 cm}} \times {\text{6 cm}}?\)

A
7100
B
6400
Correct
C
8000
D
6000

Find the volume of a cylinder whose base radius is 14 cm and height is 35 cm.

A
21560 \({\text{c}}{{\text{m}}^{\text{3}}}\)
Correct
B
71560 \({\text{c}}{{\text{m}}^{\text{3}}}\)
C
21650 \({\text{c}}{{\text{m}}^{\text{3}}}\)
D
32560 \({\text{c}}{{\text{m}}^{\text{3}}}\)

Find the volume of the cylinder whose height is 7 cm and radius is 20 cm.

A
6600 \({\text{c}}{{\text{m}}^{\text{3}}}\)
B
8000 \({\text{c}}{{\text{m}}^{\text{3}}}\)
C
7700 \({\text{c}}{{\text{m}}^{\text{3}}}\)
D
8800 \({\text{c}}{{\text{m}}^{\text{3}}}\)
Correct

Find the area of the following trapezium.

A
240 \({\text{c}}{{\text{m}}^{\text{2}}}\)
B
255 \({\text{c}}{{\text{m}}^{\text{2}}}\)
Correct
C
300 \({\text{c}}{{\text{m}}^{\text{2}}}\)
D
200 \({\text{c}}{{\text{m}}^{\text{2}}}\)

Surface area of a cylinder = _________

A
\({\text{2}}\left( {r + h} \right)\)
B
\({\text{2}}\pi r\left( {r + h} \right)\)
Correct
C
\({\text{2}}\pi r\)
D
None of these

1 \({\text{c}}{{\text{m}}^{\text{3}}}\) = _______ mL

A
10
B
None of these
C
1
Correct
D
2

Find the area of a rhombus whose side is 5 cm and its altitude is 4 cm.

A
32 \({\text{c}}{{\text{m}}^{\text{2}}}\)
B
28 \({\text{c}}{{\text{m}}^{\text{2}}}\)
C
24 \({\text{c}}{{\text{m}}^{\text{2}}}\)
Correct
D
20 \({\text{c}}{{\text{m}}^{\text{2}}}\)

Radha bought a rectangular plot of dimensions \({\text{12}}0{\text{ m x 8}}0\) m and Radhika bought a square field of dimension 95 m. Who bought plot of greater area and by how much?

A
675 \({{\text{m}}^{\text{2}}}\)
B
None of these
C
575 \({{\text{m}}^{\text{2}}}\)
Correct
D
475 \({{\text{m}}^{\text{2}}}\)