Volume of Cylinder
Solids like measuring jars, circular pillars, circular pencils, circular pipes, road rollers, etc., are said to have a cylindrical shape.
Volume of Cylinder = πr2h (cubic units)
Where, r = base radius, h = height of cylinder
Example 1: Find the volume of a cylinder whose radius is 10cm and height is 15cm. Take π = 22/7?
Solution:
Volume of Cylinder = πr2h = 22/7(10 x 10 x 15)
= 4714.28 cm3
Example 2: Find the height of a cylinder whose radius is 7cm and volume is 1540cm3.Take π = 22/7?
Solution:
Volume of Cylinder = πr2h
=> 1540 = 22/7(7 x 7 x h)
=> h = 10cm
Volumes – Surface Area & Volumes | Class 9 Maths
If an object is solid then space occupied by such an object is measured and termed as the Volume of the object. In short, the Volume of an object is the measure of the space it occupies, and the capacity of an object is the volume of substance its interior can accommodate. So, if we were to talk of the volume of a cube, we would be considering the measure of the space occupied by the cube.
The Unit of measurement of Volume is the cubic unit.