Explanation:

- The man covers a certain distance at a speed of 8 km/h in 12 minutes.

- To find the distance, convert time to hours: 12 minutes is 0.2 hours.

- Distance = Speed × Time = 8 km/h × 0.2 h = 1.6 km.

- Now, walking at a speed of 12 km/h, we calculate the time taken.

- Time = Distance / Speed = 1.6 km / 12 km/h = 0.1333 hours.

- Convert hours to minutes: 0.1333 hours × 60 minutes/hour = 8 minutes.

Option:3 - 8 minutes