Q.1. Is there any vertex of the cylinder?
No
Q.2. If r of cylinder is doubled, then by how much its volume will increase?
Four times
Q.3. If the height of right circular cylinder is doubled then by how much its volume will increase?
Two times
Q.4. If the radius of the base of a right-circular cylinder is halved keeping the height same, find the ratio of the volume of the reduced cylinder to that of the original cylinder.
1:4
Q.5. What is a cylinder?
On folding a rectangular sheet along the length or breadth, we get shape called cylinder.
Q.6. What is the volume of a cylinder?
πr2h. Where r = radius of base, h = height of cylinder.
Q.7. What is the axis of cylinder?
Line joining the centres of the circular cross-sections of a cylinder is called the axis of the cylinder.
Q.8. If the height of a circular cylinder is reduced to one-ninth and the radius of its base is trippled, then what will be the effect on the volume of the cylinder?
No change in the volume of the cylinder.
Q.9. What are the Real-Life Examples of Right Circular Cylinder?
The right circular cylinder can be seen in real life. For example, toilet paper rolls, cans, pipes, torches.
Q.10. What is a Total Surface Area of Right Circular Cylinder?
The total surface area of the right circular cylinder is defined as the area that is occupied by the entire right cylinder. This area is calculated by adding areas of two circles and a curved surface. The total surface area of a right circular cylinder is calculated using the formula 2πr(h + r) square units.
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