E. coli has only 4.6 ×${10}^6$ base pairs and completes the process of replication within 18 minutes; then the average rate of polymerization is approximately?

E. coli that has only 4.6 ×${10}^6$ bp (compare it with humans whose diploid content is 6.6 × ${10}^9$ bp), completes the process of replication within 18 minutes; that means the average rate of polymerization has to be approximately 2000 bp per second.