Question

The size of bacteria in 1u. find the number of bacteria in 1 m length

Answer 1

we know that
$1u \: = {10}^{ - 6} m$
so no. of bacteria in 1 m :
$n = \frac{length(1m)}{size \: ofbacteria}$
or
$n \: = \: \frac{1}{ {10}^{ - 6} }$
so we get

$n \: = {10}^{6} bateria$