The elongation rate of the i-RNA molecule is about 50 nucleotides per second. How long does it take to synthesize i-RNA

The elongation rate of the i-RNA molecule is about 50 nucleotides per second. How long does it take to synthesize i-RNA containing information about the structure of a protein whose molecular weight is 45,000 if the average molecular weight of one amino acid is 100?

1) the number of amino acids in the protein is 45,000: 100 = 450;
2) the number of nucleotides in i-RNA: 450 x 3 = 1350;
3) the synthesis of i-RNA will take 1350: 50 = 27 seconds.