First, lets convert Robert's pace to metres. (cm > m)
75cm = (75/100)m
= 0.75m
Number of Full Paces = Length of Bridge / 1 Full Pace
=
See , we must have fullpaces, and in this case we are finding the minimum number of paces, so we will be looking at the lowestpossiblewholenumber, which in this case, is 307paces.