If Joseph takes route A to Boston and it takes him 5 hours, then the total time for the round trip would be 5 hours to Boston + 5 hours back home = 10 hours.
If he takes route B for both the journey to Boston and the return journey, and it takes him 2 hours for each, then the total time for the round trip would be 2 hours to Boston + 2 hours back home = 4 hours.
To calculate the time saved, we subtract the total time for route B from the total time for route A: 10 hours - 4 hours = 6 hours.
Therefore, Joseph would save 6 hours if he chooses route B for both the journey to Boston and the return journey to his home.
#### 6
The answer is: 6
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Joseph takes route A to Boston, it will take him 5 hours to arrive, but if he takes route B, it will only take him 2 hours. How much time will he save if he chooses route B for both the journey to Boston and the return journey to his home?

### Answer:
