The diameter of intemal & external surface of a hollow spherical shell are 6 cm & 10 cm respectively. If it is
melted & recast into a solid cylinder of height 2 cm, find the diameter of the cylinder.
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1
Answer:
Volume of sphere = V
s
=
3
4
π(R
e
3
−R
i
3
)
V
s
=π×7
2
×h
⇒h=
3×7
2
4(5
3
−3
3
)
=
3
8
cm
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