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Madhya Pradesh Police Exam Model Paper 1
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© examsnet.com
Question : 59
Total: 100
What is the length of a cylindrical wire of radius 6 cm that can be drawn from a copper sphere of radius 21cm?
343 cm
1029 cm
2058 cm
686 cm
Validate
Solution:
Given
Radius of the cylindrical wire = 6 cm
Radius of the sphere = 21cm
Formula
Volume of cylinder
=
π
r
2
h
Volume of sphere
=
(
4
/
3
)
π
r
3
Calculation
π
r
2
h
=
(
4
/
3
)
π
R
3
⇒
h
=
(
4
/
3
)
R
3
/
r
2
=
(
4
/
3
)
×
(
21
3
/
6
2
)
=
343
c
m
© examsnet.com
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