The diagram shows a glue stick in the shape of a
Cylinder. If 80% of the volume is actually the glue.
Find the volume of glue
lue in the stick.
-5cm -
(1-8cm
Glue
stick.
18cm
Answers
Given : a glue stick in the shape of a
Cylinder. If 80% of the volume is actually the glue.
To Find : volume of glue in the stick
Solution:
As figure is not given :
CASE 1 :
Assuming 1.8 cm as Diameter
and 5 cm as Height
Volume = πr²h
r = 1.8/2 = 0.9 cm
h = 5 cm
π = 3.14
Volume = 3.14 ( 0.9)² * 5 = 12.717 cm³
80 % of volume is glue = 0.8 x 12.717 = 10.1736 cm³
volume of glue in the stick = 10.1736 cm³
CASE 2 :
Assuming 1.8 cm as radius
and 5 cm as Height
Volume = πr²h
r = 1.8 cm
h = 5 cm
π = 3.14
Volume = 3.14 ( 1.8)² * 5 = 50.868 cm³
80 % of volume is glue = 0.8 x 50.868 = 40.6944 cm³
volume of glue in the stick = 40.6944 cm³
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