Question 1210215
Let's break down this problem step-by-step:

**Part 1: How long would Michelle take to catch up with Tim?**

1. **Calculate the time Tim traveled before Michelle started:**
   - Michelle started 48 minutes later than Tim.
   - Convert 48 minutes to hours: 48 minutes / 60 minutes/hour = 0.8 hours.

2. **Calculate the distance Tim traveled before Michelle started:**
   - Tim's speed = 75 km/hour
   - Time Tim traveled = 0.8 hours
   - Distance Tim traveled = speed × time = 75 km/hour × 0.8 hours = 60 km.

3. **Determine the relative speed between Michelle and Tim:**
   - Michelle's speed = 95 km/hour
   - Tim's speed = 75 km/hour
   - Relative speed = Michelle's speed - Tim's speed = 95 km/hour - 75 km/hour = 20 km/hour.
   - This is the rate at which Michelle is closing the distance between herself and Tim.

4. **Calculate the time Michelle takes to catch up:**
   - Distance Tim was ahead when Michelle started = 60 km
   - Relative speed = 20 km/hour
   - Time to catch up = Distance / Relative speed = 60 km / 20 km/hour = 3 hours.

**So, Michelle would take 3 hours to catch up with Tim.**

**Part 2: How far away was Tim from B when Michelle completed her journey?**

1. **Calculate the total time Michelle took to reach B:**
   - Distance from A to B = 285 km
   - Michelle's speed = 95 km/hour
   - Time Michelle took = Distance / Speed = 285 km / 95 km/hour = 3 hours.

2. **Calculate the total time Tim traveled when Michelle completed her journey:**
   - Tim started 0.8 hours before Michelle.
   - Michelle's journey took 3 hours.
   - Total time Tim traveled = 0.8 hours + 3 hours = 3.8 hours.

3. **Calculate the distance Tim traveled in 3.8 hours:**
   - Tim's speed = 75 km/hour
   - Total time Tim traveled = 3.8 hours
   - Distance Tim traveled = speed × time = 75 km/hour × 3.8 hours = 285 km.

4. **Calculate the distance Tim was from B when Michelle completed her journey:**
   - Distance from A to B = 285 km
   - Distance Tim traveled = 285 km
   - Distance Tim was from B = Total distance - Distance Tim traveled = 285 km - 285 km = 0 km.

**So, Tim was 0 km away from B (he had just arrived) when Michelle completed her journey.**