18. The length of outer and inner diameter of hollow right circular cy

1.	18. The length of outer and inner diameter of hollow right circular cylinder are 16 cm. and 12cm. respectively. Height of cylinder is 36 cm. Let us calculate how many solid cylinders of2 cm, diameter and 6 cm. length may be obtained by melting this cylinder.
Answer» Answer: Solution : The outer diameter = 16 cm The outer RADIUS The inner diameter = 12 cm the inner radius . Height of the cylinder . So, the volume of the materials of the HOLLOW cylinder . The radius of small cylinders to be made and their lengths = 6 cm each. The volume of each small cylinders to be made So the required number of small cylinders . HENCE the required number of cylinders to be made is equal to 42. [ N.B. : If the outer and inner radius ( not diameter) be 16 cm and 12 cm respectively, then the number of cylinders is 168. ]

18. The length of outer and inner diameter of hollow right circular cylinder are 16 cm. and 12cm. respectively. Height of cylinder is 36 cm. Let us calculate how many solid cylinders of2 cm, diameter and 6 cm. length may be obtained by melting this cylinder.

Answer»

Answer:

Solution :

The outer diameter = 16 cm

The outer RADIUS

The inner diameter = 12 cm

the inner radius

.
Height of the cylinder

.
So, the volume of the materials of the HOLLOW cylinder

.
The radius of small cylinders to be made

and their lengths = 6 cm each.

The volume of each small cylinders to be made

So the required number of small cylinders

.
HENCE the required number of cylinders to be made is equal to 42.
[ N.B. : If the outer and inner radius ( not diameter) be 16 cm and 12 cm respectively, then the number of cylinders is 168. ]

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