Answer:
Let's break down Ben's bushwalking journey:
1. Ben started his bushwalk at 8 a.m.
2. In the first 2 hours, he walked 7 km.
3. After resting for 30 minutes, he walked an additional 5 km in the next hour.
4. He then spent an hour having lunch before starting his return trip to his starting point.
5. On the return trip, he walked without stopping for 3 hours.
To calculate the total distance Ben walked during his bushwalk, we can add up the distances from each segment:
- Distance walked in the first 2 hours: 7 km
- Distance walked after the 30-minute rest: 5 km
- Distance walked during the return trip of 3 hours: (assuming the same pace) 5 km/h * 3 hours = 15 km
Total distance walked = 7 km + 5 km + 15 km = 27 km
Therefore, Ben walked a total distance of 27 km during his bushwalking trip.