46 meters
V = 143.4 cm^3 = 143.4 * 10^3 mm^3 = 143400 mm^3 r = d/2=1 mm L = V/(pi*r^2) = 143400 / (3.14*1^2) = 45645.64 mm ≈ 46 meters
A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into 10 equal parts. Find the total length of the silver wire required.