Q32 of 189 Page 512

In a cylinder, if the radius is halved and the height is doubled, then the volume will be

Let the radius be r and height be h


Volume of a cylinder =


When radius = and height = 2h


Volume =


The volume will be halved.

More from this chapter

All 189 →
30

Two circular cylinders of equal volume have their heights in the ratio 1 : 2. The ratio of their radii is

 31

The ratio between the curved surface area and the total surface area of a right circular cylinder is 1 : 2. If the total surface area is 616 cm2, then the volume of the cylinder is

 33

The number of coins 1.5 cm in diameter and 0.2 cm thick to be melted to form a right circular cylinder of height 10 cm and diameter 4.5 cm is

 34

The radius of a wire is decreased to one-third. If volume remains the same, the length will become