A copper rod of diameter 1cm and length 8cm is drawn into a wire of length 18m of uniform thickness. Find thickness of wire?
Given diameter of copper rod(d1) = 1cm
Length of copper rod (h1) = 8cm
Volume of cylinder`=pir_1^2h_1`
Length of wire(h2) = 18m = 1800cm
Equating (1) and (2)
V1 = V2
r2 = 0.033cm
∴Radius thickness of wire = 0.033cm .