Answer :

Certainly! Let's walk through the problem step by step to find out how far the bus travels on 1 gallon of gas.

1. Identify the given quantities:
- The bus traveled a total distance of 275 miles.
- The bus used a total of 55 gallons of gas.

2. Understanding the question:
- We need to find out how many miles the bus travels per gallon of gas, which is the unit rate we are looking for.

3. Calculate the unit rate:
- To find miles per gallon, we divide the total miles traveled by the total gallons of gas used.
- This can be set up as a division problem:

[tex]\[ \text{Miles per gallon} = \frac{\text{Total miles traveled}}{\text{Total gallons of gas used}} \][/tex]

- Plugging in our numbers:

[tex]\[ \text{Miles per gallon} = \frac{275 \, \text{miles}}{55 \, \text{gallons}} \][/tex]

4. Performing the division:
- Dividing 275 miles by 55 gallons gives us:

[tex]\[ \text{Miles per gallon} = 5 \, \text{miles per gallon} \][/tex]

So, the bus travels 5 miles on 1 gallon of gas. Thus, the correct answer is:

5 miles.