A copper rod of diameter 1 cm and length 8 cm is drawn into a wire of length 8m of uniform thickness. Find the thickness of the wire. I need the answer fast plz
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Answer:
The volume of the rod = π×( 1/2 )^2 ×8=2π cm^3
The length of the new wire of the same volume = 18 m = 1800 cm
If r is the radius ( in cm ) of cross-section of the wire, its volume = π×r^2×1800 cm^3
Therefore,
π×r^2×1800=2π
r^2 = 900
r = 1/30
So, the diameter of the cross section, i.e., the thickness of the wire is 1/15 cm, i.e., 0.67 mm (approx.) => ANSWER
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