1. Convert time to hours:

* There are 60 minutes in an hour, so 8 minutes is equal to 8/60 = 0.1333 hours.

2. Calculate speed:

* Speed is calculated as distance divided by time:

* Speed = Distance / Time

* Speed = 4 km / 0.1333 hours

* Speed ≈ 30 km/h

Therefore, the speed of the object is approximately 30 kilometers per hour.