Diameter= 0.4 cm ==> \(V = \frac{4}{3}\pi r^3 = \frac{4}{3} \pi \cdot 2^3 = \frac{32}{3} \pi\), or about 33.51 cm^3.
Each lead ball has a mass of (33.51)(11.3) = 378.663 g.
So, 5000 balls have a mass of 1,893,315 g or 1,893 kg.
+1223 
