r= 0,2 cm and V= 26.4 cm^3 V = r^2 * Pi * L --> L = 26.4 cm^3/(0.2cm^2*3.14)= 210 cm= 2.1 m
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.