Answer:
The length of trip is 108 miles.
Step-by-step explanation:
Consider the provided information,
Bob traveled 90 miles which was 83 1/3 % of his trip.
Let the total number of miles is x.
It is given that 83 1/3% of x is 90.
Therefore,
\(x\times 83\frac{1}{3}\%=90\)
\(x\times \frac{250}{3}\times \frac{1}{100}=90\)
\(x\times \frac{5}{6}=90\)
\(x=90\times \frac{6}{5}\)
\(x=18\times6\)
\(x=108\)
Hence the length of trip is 108 miles.