1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

RD Sharma - Mathematics

21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)

1. Rational Numbers
2. Powers
3. Squares and Square Roots
4. Cubes and Cube Roots
5. Playing with Numbers
6. Algebraic Expressions and Identities
7. Factorization
8. Division of Algebraic Expressions
9. Linear Equation in One Variable
10. Direct and Inverse Variable
11. Time and Work
12. Percentage
13. Profit, Loss, Discount and Value Added Tax (VAT)
Compound Interest
15. Understanding Shapes-I (Polygons)
16. Understanding Shapes-II (Quadrilaterals)
17. Understanding Shapes-III (Special Types of Quadrilaterales)
18. Practical Geometry (Constructions)
19. Visualising Shapes
20. Mensuration-I (Area of a Trapezium and a Polygon)
21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)
22. Mensuration-III (Surface Area and Volume of a Right Circular Cylinder
23. Data Handling-I (Classification Representation of Data as Histograms)
24. Data Handling-II (Graphical Representation of Data as Pie Charts
25. Data Handling-III (Pictorial Representation of Data as Pie Charts
26. Data Handling-IV (Probability)
27. Introduction to Graphs

Exercise 21.1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Exercise 21.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Exercise 21.3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Exercise 21.4

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Q. 113.7( 4 Votes )

How many bricks each of size 25 cm× 10 cm× 8 cm will be required to build a wall 5 m long, 3 m high and 16 cm thick, assuming that the volume of sand and cement used in the construction is negligible?

Class 8th RD Sharma - Mathematics 21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)

Answer :

Given,

Size of one brick = 25cm × 10cm × 8cm

Dimensions of wall = 5m × 3m × 16cm = 500 cm ×300 cm ×16cm

So,

Number of bricks needed to make the wall =

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSHow many planks each of which is 3 m long, 15 cm broad and 5 cm thick can be prepared from a wooden block 6 m long., 75 cm broad and 45 cm thick?NEXTA village, having a population of 4000, required 150 litres water per head per day. It has a tank which is 20 m long, 15 m broad and 6 m high. For how many days will the water of this tank last?

Related Videos

Quiz | Practice More Questions on Cube and Cube Roots27 mins

Champ Quiz | Cube and Cube Roots46 mins

Quiz | Cubes and Cube Roots41 mins

Champ Quiz | Cubes and Cube Roots33 mins

Quiz | Solve Imp. Qs. of Cube and Cube Roots39 mins

The History and Chemistry Behind a Matchstick!37 mins

Lets Make a Timetable and Crack Olympiad40 mins

Champ Quiz | Square Roots and Cube roots40 mins

Concentration makes you a Champ30 mins

Be a Master of Chemical Properties in 30 minutes !29 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

view all courses

RELATED QUESTIONS :

A rectangular strip 25 cm× 7 cm is rotated about the longer side. Find the volume of the solid, thus generated.

RD Sharma - Mathematics

Fill in the blanks to make the correct statement.

Two cylinders of equal volume have heights in the ratio 1:9. The ratio of their radii is ________.

NCERT - Mathematics Exemplar

A beam 5 m long and 40 cm wide contains 0.6 cubic metre of wood. How thick is the beam?

RD Sharma - Mathematics

The radii of two cylinders are in the ratio 2 : 3 and their heights are in the ratio 5 : 3. Calculate the ratio of their volumes.

RD Sharma - Mathematics

A rectangular field is 70 m long and 60 m broad. A well of dimensions 14 m × 8 m × 6 m is dug outside the field and the earth dug-out from this well is spread evenly on the field. How much will the earth level rise?

RD Sharma - Mathematics

How many bricks, each of size 25 cm x 13.5 cm x 6 cm, will be required to build a wall 8 m long, 5.4 m high and 33 cm thick?

RS Aggarwal - Mathematics

The ratio between the curved surface area dna the total surface area of a right circular cylinder is 1 : 2. Find the volume of the cylinder, if its total surface area os 616 cm².

RD Sharma - Mathematics