A copper rod of diameter 1 cm and length 8 cm is drawn into a wire of length 18 m of uniform thickness. Find the thickness of the wire
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Step-by-step explanation:
Diameter=1cm
radius=1/2cm
Volume of rod=22/7×1/2×1/2×8
=44/7 cm^3
Length of wire =18m
=1800cm
Volume of rod =22/7×r^2×1800
44/7=22/7×r^2×1800
r^2=1/900
r=1/30
Thickness=1/15
=0.67mm
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