cylinder r=4.5/2m,h=3cm and a coin r=1.5/2cm thickness=2cm find no of coin.
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Answered by
0
Answer:
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Answered by
0
Answer:is 45
Explanation:The correct option is (b):
450
Given: Diameter of coin
=
1.5
c
m
Radius of coin
=
1.5
2
c
m
=
0.75
c
m
Thickness of coin
=
height of coin
=
0.2
c
m
Diameter of required right circular cylinder
=
4.5
c
m
Radius of required right circular cylinder
=
4.5
2
c
m
=
2.25
c
m
We know that the volume of cylinder is given by
V
=
π
r
2
h
As the coins are in the form of thin cylinder
Volume of each coin
=
π
×
(
0.75
)
2
×
0.2
=
0.1125
π
c
m
3
Volume of required right circular cylinder
=
π
×
(
2.25
)
2
×
10
=
50.625
π
c
m
3
Number of coin required
=
(volume of required right circular cylinder)
(volume of each coin)
=
50.625
π
0.1125
π
=
450
coins
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