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Rd sharma solutions
Grade 8 
Mathematics
Mathematics class 8th RD Sharma
Surface Area and Volume of Right Circular Cylinder
Surface Area and Volume of Right Circular Cylinder Exercise 22.2
Question 31
Mathematics
Mathematics class 8th RD Sharma
Surface Area and Volume of Right Circular Cylinder
Surface Area and Volume of Right Circular Cylinder Exercise 22.2
Question 31
Surface Area and Volume of Right Circular Cylinder | Surface Area and Volume of Right Circular Cylinder Exercise 22.2
Question 31
CHAPTERS
6. Algebraic Expressions and Identities
8. Division of Algebraic Expressions
9. Linear Equation in One Variable
10. Direct and Inverse Variations
13. Profit Loss Discount and Value Added Tax
15. Understanding Shapes Polygons
16. Understanding Shapes Quadrilaterals
17. Understanding Shapes Special Types Quadrilaterals
20. Area of Trapezium and Polygon
21. Volume Surface Area Cuboid Cube
22. Surface Area and Volume of Right Circular Cylinder
23. Classification And Tabulation Of Data
24. Classification And Tabulation Of Data Graphical Representation Of Data As Histograms
25. Pictorial Representation Of Data As Pie Charts Or Circle Graphs
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.
We have,
Internal diameter of cylindrical tube = 10.4 cm
Internal radius of tube = d/2 = 10.4/2 = 5.2cm
Length of tube = 25 cm
Thickness of metal = 8 mm = 0.8 cm
Outer radius of tube = R = 5.2+0.8 = 6 cm
∴ Volume of metal = π (R2 – r2) × l
= 22/7 × (62 – 5.22) × 25
= 22/7 × (36 – 27.04) × 25
= 704 cm3
Algebraic Expressions and Identities
Division of Algebraic Expressions
Linear Equation in One Variable
Profit Loss Discount and Value Added Tax
Understanding Shapes Quadrilaterals
Understanding Shapes Special Types Quadrilaterals
Volume Surface Area Cuboid Cube
Surface Area and Volume of Right Circular Cylinder
Classification And Tabulation Of Data
Classification And Tabulation Of Data Graphical Representation Of Data As Histograms
Pictorial Representation Of Data As Pie Charts Or Circle Graphs
Question 31
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.
We have,
Internal diameter of cylindrical tube = 10.4 cm
Internal radius of tube = d/2 = 10.4/2 = 5.2cm
Length of tube = 25 cm
Thickness of metal = 8 mm = 0.8 cm
Outer radius of tube = R = 5.2+0.8 = 6 cm
∴ Volume of metal = π (R2 – r2) × l
= 22/7 × (62 – 5.22) × 25
= 22/7 × (36 – 27.04) × 25
= 704 cm3
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