Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

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Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

Unit 14 Worksheet 5 || Mensuration

1. Two cubes each of side 6 cm are joined together. Name the new solid formed. Also, find the volume of new solid formed.

Answer 1:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

2. Find the height of a cuboid whose volume is 275 cm3 and the base area is 25 cm2.

Answer 2:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

3. The dimensions of a box are 60 cm x 54 cm x 30 cm. How many small cubes of side 6 cm can be placed in the box?

Answer 3:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

4. If each edge of a cube is doubled.

(i) how many times will its surface area increase?

(ii) how many times will its volume increase?

Answer 4:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

5. A match box measures 4 cm x 2.5 cm x 1.5 cm. What will be the volume of a packet containing 12 such boxes?

Answer5:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

6. Volume of a cube is 1,000 cm3. Find its total surface area.

Answer 6:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

7. How many planks each of which is 2 m long. 2.5 cm broad and 4 cm thick can be cut off from a wooden block 6 m long. 15 cm broad and 40 cm thick?

Answer 7:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

8. Three solid metal cubes with edges 6 cm, 8 cm and 10 cm respectively are melted together and formed into a single cube. Find the volume of new cube.

Answer 8:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

9. Find the volume of a cube whose surface area is 150 m2.

Answer 9:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

10. Find the volume of a cube, one face of which has an area of 81 m2.

Answer 10:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

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