Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

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Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

Unit 14 Worksheet 3 || Mensuration

1. Find the length of the side of a cube whose total surface area measures 600 cm2.

Answer 1:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

2. The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the inner of the room and ceiling at the rate of 50 per square metre.

Answer 2:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

3. Find the total surface area of a closed cardboard box of length 0.5 m, breadth 25 cm and height 15 cm.

Answer 3:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

Q 4.

Answer 4:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

5. The dimensions of an oil tin arc are 26 cm x 26 cm x 45 cm. Find the area of tin sheet required to make 20 such tins.

Answer 5:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

6. A swimming pool is 20 m in length, 15 m in breadth, 4 m in depth. Find the cost of cementing its floor and walls at 35 per m2.

Answer 6:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

7. A cubical box with a lid has a length of 30 cm. Find the cost of painting the inside and outside of the box at 5.50 per m2.

Answer 7:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

8. Two cubes of side 4 cm are fixed together. Find the total surface area of the new solid formed.

Answer 8:

Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

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