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## Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics

## Unit 14 Worksheet 6 || Mensuration

**1. Find the volume of a right circular cylinder if **

**(i) radius of its base = 7 cm, height = 1.5 dm **

**Answer (i):**

**(ii) area of base = 154 cm2, height = 1.5 cm **

**Answer (ii):**

**(iii) circumference of base = 1.32 m, height = 25 cm **

**Answer (iii):**

**2. How many cubic metres of earth must be dug out to sink a well 16 m in depth and 7 m in diameter? **

**Answer 2:**

**3. A water tank is cylindrical in shape and the diameter of its base is 28 m. If it is 7 metres deep, how many kilolitres of water can it hold? **

**Answer 3:**

**4. The radius of the base of a cylindrical oil can is 4 m. Find its height if it can contain 1,408 kilolitres of oil. **

**Answer 4:**

**5. The radius and height of a cylinder are in the ratio 5 : 7 and its volume is 550 cm3. Find its radius. **

**Answer 5:**

**6. The thickness of a hollow metallic cylinder is 2 cm. It is 35 cm long and its inner radius is 12 cm. Find the volume of metal required to make the cylinder, assuming it is open, at either end. **

**Answer 6:**

**7. A rectangular sheet of paper is rolled along its length to make a cylinder. The sheet is 33 cm long and 32 cm wide. A circular sheet of paper is attached to the bottom of the cylinder formed. Find the capacity of cylinder so formed.**

**Answer 7:**

**8. Two solids of right cylindrical shape are 49 cm and 35 cm high and their base diameters are 16 cm, 14 cm respectively. Both are melted and moulded into a single cylinder, 56 cm high. Find its base diameter. **

**Answer 8:**

**9. The volume of a metallic cylindrical pipe is 748 cm3. Its length is 14 cm and its external radius is 9 cm. Find its thickness. **

**Answer 9:**

**10. The volume of a cylinder is 150π cu. cm and its height is 6 cm. Find the areas of its total surface and lateral (curved) surface. **

**Answer 10:**

**11. The Curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the diameter and the height of the pillar.**

**Answer 11:**

- DAV class 8 Maths Book Solutions
- Chapter 1 | Square and Square Roots | Class-8 DAV Secondary Mathematics
- Chapter 2 | Cube and Cube Roots | Class-8 DAV Secondary Mathematics
- Chapter 3 | Exponents And Radicals | Class-8 DAV Secondary Mathematics
- Chapter 4 | Direct And Inverse Variation | Class-8 DAV Secondary Mathematics
- Chapter 5 | Profit, Loss And Discount | Class-8 DAV Secondary Mathematics
- Chapter 6 | Compound Interest | Class-8 DAV Secondary Mathematics
- Chapter 7 | Algebraic Identities | Class-8 DAV Secondary Mathematics
- Chapter 8 | Polynomials | Class-8 DAV Secondary Mathematics
- Chapter 9 | Linear Equations In One Variable | Class-8 DAV Secondary Mathematics
- Chapter 10 | Parallel Lines | Class-8 DAV Secondary Mathematics
- Chapter 11 | Understanding Quadrilaterals | Class-8 DAV Secondary Mathematics
- Chapter 12 | Construction Of Quadrilaterals | Class-8 DAV Secondary Mathematics
- Chapter 13 | Introduction To Graphs | Class-8 DAV Secondary Mathematics
- Chapter 14 | Mensuration | Class-8 DAV Secondary Mathematics
- Chapter 15 | Statistics and Probability | Class-8 DAV Secondary Mathematics
- Chapter 16 | Rotational Symmetry | Class-8 DAV Secondary Mathematics