Size of a bacteria = 1 µ
Total length = 1m
∴ Number of bacteria in 1m length = 1 m / 1 µ
As we know, 1 µ = 10-6m, substituting the value in the relation above we get:
Number of bacteria in 1 m length = 1 m/ 10-6 m = 106
Hence, the number of bacteria in 1m length = 106 bacteria.