A metal cube of side 3.2cm each is melted to from a cylindrical wire of radius 2mm . find the length of wire
sandeep232:
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Cube:
a=3.2cm
Cylinder wire:
r=2/10
=0.2cm
Volume of cylinder wire=Volume of cube
πr^2h=a^3
(22/7)·0.2·0.2·h=3.2·3.2·3.2
h=(3.2·3.2·3.2·7)/(22·0.2·0.2)
h=(1.6·1.6·1.6·7)/(11·0.1·0.1)
h=260.65cm
h=261cm [approximately]
a=3.2cm
Cylinder wire:
r=2/10
=0.2cm
Volume of cylinder wire=Volume of cube
πr^2h=a^3
(22/7)·0.2·0.2·h=3.2·3.2·3.2
h=(3.2·3.2·3.2·7)/(22·0.2·0.2)
h=(1.6·1.6·1.6·7)/(11·0.1·0.1)
h=260.65cm
h=261cm [approximately]
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