Volume of cylinder
Volume of cylinder
Volume of A Cylinder: Volume of Cylinder = Measure of the space occupied by the cylinder
= The area of each circular sheet x Height
=
Thus, Volume of a right circular cylinder = Area of the base x Height =
Illustration: Find the volume of a right circular cylinder, if the radius of its base and height are 7 cm and 15 cm respectively.
Solution: We know that, Volume of cylinder = . Here, r = 7cm and h = 15cm
Volume of cylinder
Illustration: A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled into it. The diameter of the pencil is 7mm, the diameter of the graphite is 1 mm and the length of the pencil is 14 cm. Find the:
(i) Volume of the graphite
(ii) Volume of the wood
(iii) The weight of the whole pencil, if the specific gravity of the wood is and that of the graphite is
.
Solution: We have,
Diameter of the graphite cylinder = 1 mm =
So, radius of the graphite cylinder
Length of the graphite cylinder = 14 cm
Volume of the graphite cylinder
(ii) We have,
Diameter of the pencil = 7 mm
So, radius of pencil
Length of pencil = 14 cm
Volume of the pencil
Volume of the wood
(iii) We have,
The difference between inside and outside surface areas of a cylindrical tube 14 cm long is 88 sq. cm. If the volume of the tube is 176 cubic cm, find the Outer radius of the tube. | |||
| Right Option : A | |||
| View Explanation | |||
A hollow cylindrical tube open at both ends, is made of iron 2 cm thick. If the external diameter is 50 cm and the length of the tube is 140 cm, what is the volume of the iron used? | |||
| Right Option : A | |||
| View Explanation | |||
The difference between inside and outside surfaces of a circular cylinder 14 cm long is 88 sqw.cm. If the volume of the tube is 176 cu cm, find the outer radius of the cylineder. | |||
| Right Option : B | |||
| View Explanation | |||
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